161 Matching Annotations
  1. Sep 2025
    1. hese findings highlight the complex relationship between acute physiological responses and long-term recovery outcomes in women

      These findings suggest recovery modalities may need to be personalized, and the effects observed in male athletes might not directly apply to females.

    2. Neither CWI nor HWI improved subjective or objective recovery characteristics compared to passive CON

      Neither cold nor hot water immersion improved subjective or objective recovery markers over 72 hours in recreationally active women.

    3. , CWI applied after a standardised drop-jump exercise protocol significantly reduces SmO2 and Tskin

      CWI reduces muscle oxygenation saturation and skin temperature, while HWI increases core and skin temperatures after exercise.

    4. While we did not observe appreciable differences in CK levels and muscle swelling between the CWI and HWI group or CON, HWI resulted in significantly greater muscle swelling at 24 h and increased CK levels at 24 h and 72 h compared to CON.

      Variability in CK and swelling responses highlight individual differences and suggest these markers alone cannot fully explain recovery.

    5. Further research in this area is needed, incorporating different water immersion protocols in functional and athletic exercises within a female population.

      The study’s female participants may have unique responses compared to previously studied male cohorts, emphasizing the need for more sex-specific research.

    6. Psychological, social, and contextual factors have been shown to play a major role in functional recovery [65], suggesting that neither CWI nor HWI can be recommended as a recovery modality without considering individual preferences

      Psychological factors such as belief and expectations might influence perceived recovery benefits of CWI more than physiological effects.

    7. Despite distinct acute physiological responses to CWI and HWI, neither intervention improved subjective or objective recovery outcomes during a 72 h follow-up period.

      Although CWI and HWI cause distinct acute physiological effects (like changes in muscle oxygenation and temperatures), these did not translate into better recovery outcomes over 72 hours.

    8. Two hours after the first CWI or HWI, a second set of immersions of identical duration (10 min) and water temperature (10°C or 40°C) was performed

      Two sessions, immediate and after 2 hours.

    9. CON received no treatment and recovered for 10 minutes in a supine position in a room with an ambient temperature of 21 ± 2°C and a relative humidity of 40 ± 5%.

      Passive rest supine at room temperature.

    10. Immediately after exercise and two hours later, participants underwent their assigned recovery interventions. All physiological parameters were measured at baseline (BL), directly following exercise (postEx), and 1 min (postInt), 10 min, 20 min, and 30 min after the first recovery intervention

      Screening and familiarization, baseline measures, exercise protocol, two immersion sessions (immediate and 2 hours post-exercise), followed by recovery assessments over 72 hours.

    11. Participants were excluded if they were smokers, pregnant, had acute injuries or pain, had injuries in the trunk area or lower extremities within less than one year, or were taking medication

      Who was excluded

    12. A total of n = 30 recreationally active volunteers were included. Women aged between 18 and 35 years old with no previous surgery on the musculoskeletal system of the trunk and lower limbs were eligible for the study

      participants

    13. To our knowledge, existing studies have only been conducted on male subjects. Female participants are significantly underrepresented in sports and exercise medicine research, including studies related to CWI and HWI

      Female-specific responses are understudied despite potential hormonal and body composition influences.

    14. Therefore, this study aimed to compare the physiological responses and effects of post-exercise CWI and HWI on subjective and objective recovery characteristics in a female population. We hypothesised that CWI could have a more significant impact on the physiological response and, therefore, would be a more effective method than HWI for enhancing subjective recovery (DOMS) and objective recovery, measured as MVIC recovery.

      hypothesis

    15. cold water immersion (CWI) decreases superficial and subcutaneous tissue temperature, inducing local vasoconstriction in the immersed body parts.

      Overview of water immersion methods (cold and hot), physiological effects (vasoconstriction vs vasodilation, metabolism changes).

    16. Several studies have investigated the influence of post-exercise CWI on acute physiological changes or recovery (24–72 h) [11–14]. Its effectiveness appears to depend strongly on the type of the previous exercise performed

      CWI often effective, HWI results mixed and under-researched; no prior direct comparisons in women.

    17. No significant differences in recovery markers were observed between CWI and HWI groups, although HWI led to slightly higher creatine kinase levels (24 h and 72 h) and greater muscle swelling (24 h) compared to CON

      conclusion

    18. This study compared the effects of cold water immersion (CWI) and hot water immersion (HWI) on muscle recovery following a muscle-damaging exercise protocol in women

      The study focus

    1. Based on research, cold water immersion affects creatine kinase and interleukin-6 levels.

      CWI significantly influences key biomarkers (CK and IL-6) and functional recovery (vertical jump performance) in female soccer players.

    2. In this study, a comparative analysis was carried out between the two groups in orderto determine which intervention is more effective between cold water immersion (CWI) andstandard temperature water immersion. Specifically, the levels of creatine kinase (CK) andinterleukin-6 (IL-6) were found to be significantly different between the control group and theCWI group, as indicated by the findings

      The study’s findings align with previous research demonstrating CWI’s efficacy in reducing CK and IL-6 levels and improving vertical jump recovery.

    3. Various methods have been suggested for athlete recovery

      CWI’s benefits are supported by previous studies showing reduced muscle soreness and improved performance metrics [26-28].

    4. both psychological and physiological recovery are essentia

      Recovery interventions such as CWI can improve both physiological and psychological aspects of post-exercise recovery.

    5. Result of IL-6 following a one-off soccer match for thermoneutral waterimmersionand cold water immersion groups

      IL-6 levels increase significantly 24h post-match in both groups, but the rise is attenuated and recovery faster in the CWI group.

    6. The interleukin-6 (IL-6) examination procedure begins with explaining the purposeof the test and obtaining consent from the patient

      IL-6 is a pro-inflammatory cytokine, elevated levels reflect systemic inflammation post-exercise.

    7. Result of CK following a one-off soccer match for thermoneutral waterimmersionand cold water immersion groups

      Both groups experience elevated CK post-match, reflecting muscle damage from intense activity.

    8. The creatine kinase (CK) examination procedure begins with explaining the purposeof the examination to the patient and ensuring consent, followed by the preparation of toolssuch as sterile syringes, blood collection tubes, and medical gloves

      CK is a biomarker of muscle damage; increased levels indicate muscle membrane disruption.

    9. Vertical jump is a test commonly used in sports and physical therapy to meas-ure lower body strength and explosive power [20]To perform this test, first, standwith your feet shoulder-width apart and your arms relaxed at your sides

      Proper technique and consistent testing conditions are critical for reliable measurements.

    10. In group intervention, participants will undergo cold water immersion (CWI)at 10°C for 15 minutes post-soccer match

      CWI at 10°C vs TWI at 26°C for 15 minutes post-match.

    11. Untreated fatigue also has anegative impact on the mental endurance of athletes, causing them to easily feel frus-trated.

      emphasizes integrated recovery (rest, nutrition, mental care)

    12. Cold water immersionsignificantly enhanced recovery in female soccer athletes after a match by reducinginflammatory and muscle damage biomarkers and improving functional performance.

      Supports CWI as a beneficial recovery method in competitive sports.

    13. CWI showed agreater reduction in IL-6 and CK levels at both 24 and 48 hours post-match compared to TWI(p < 0.05)

      CWI reduces IL-6 and CK more effectively and speeds vertical jump recovery at 24 hours.

    14. . This study aimed to evaluate theeffectiveness of CWI in enhancing post-match recovery in female soccer players by analyzingchanges in IL-6, CK levels, and vertical jump performance.

      Evaluates cold water immersion (CWI) effects on recovery in female soccer players.

    1. In practice, we recommend employing MD-LT-CWI (10–15 min, 5°C–10°C) and MD-MT-CWI (10–15 min, 11°C–15°C) to mitigate exercise-induced muscle damage (EIMD). However, it remains crucial to develop personalized recovery plans tailored to individual athlete differences

      MD-MT-CWI (10–15 min, 11°C–15°C) is most effective for reducing muscle soreness. Personalized recovery plans are recommended based on athlete needs.

    2. MD-LT-CWI (10–15 min, 5°C–10°C) was most effective for biochemical markers

      Among six tested CWI protocols, MD-LT-CWI (10–15 min, 5°C–10°C) is best for biochemical and neuromuscular recovery.

    3. MD-MT-CWI

      Medium-temperature CWI balances cooling and comfort, reducing inflammatory mediators and edema without causing excessive vasoconstriction or discomfort. This may explain why MD-MT-CWI is more effective at reducing soreness than colder or longer exposures.

    4. This study synthesized findings from RCTs on the effects of various doses of cold water immersion (CWI) on recovery from acute exercise-induced muscle damage, revealing that different CWI protocols affect physiological markers of muscle damage (CK), subjective muscle pain (DOMS), and performance (JUMP) differently.

      The meta-analysis examined how different CWI protocols affect recovery from exercise-induced muscle damage.

    5. last 10 years

      Different Cold Water Immersion (CWI) protocols were tested (varying in duration and temperature). Most studies were recent (last 10 years) and focused on outcomes like delayed onset muscle soreness (DOMS), jump performance (JUMP), and creatine kinase (CK) levels.

    6. CWI is a prevalent recovery modality post-exercise

      general EIMD problem → potential solution (CWI) → gap in existing literature → rationale for current study.

    1. SLR flexibility

      Significantly reduced after eccentric work. CWI improved flexibility recovery. Highlights: Importance of CWI for restoring joint range and reducing stiffness.

    2. recovery effects of CWI treatment on the blood plasma Mb concentration in the hamstrings

      Surged in CG, peaked Day 4. CWI group had significantly blunted Mb increase. Mechanism: Likely due to reduced inflammation, lower metabolic demand, and improved clearance.

    3. In the present study, in the first 2 days after the eccentric contraction test, no significant differences were observed between the MVC results of the CWI group and those of the CG.

      CWI in males: Often shown to blunt long-term gains (e.g., Fyfe et al., 2019). This study: Shows short-term benefits in females, no claims on long-term adaptations.

    4. CWI treatment (water temperature of 14°C, seated position, and duration of 14 min

      Improved muscle strength (MVC), reduced soreness (DOMS), restored flexibility (SLR), and lowered plasma Mb. Supported hypothesis: CWI promotes faster recovery post-eccentric exercise in women.

    5. fter receiving five rounds of CWI treatment on five consecutive days

      Day 2–5: DOMS significantly lower in CWI group. Example: Day 2: CWI = 15.4 mm, CG = 52.4 mm Day 3: CWI = 11.6 mm, CG = 40.8 mm p < 0.000

    6. both the CWI group and the CG

      Both groups (CWI and CG) experienced similar initial responses in: MVC (Muscle strength) DOMS (Muscle soreness) SLR (Hamstring flexibility) Plasma Mb (Muscle damage marker)

    7. performed a single round of 10 sets × 10 repetitions of maximal isokinetic eccentric contraction

      Eccentric contractions (10×10 reps at 30°/s) induced muscle damage.

    8. . Therefore, the present study aims to address this deficiency by utilizing healthy adult female participants, subjecting them to high-intensity resistance training, and monitoring their recovery over a continuous 5-day period.

      Investigate if 5-day consecutive CWI at 14°C improves hamstring recovery post-EIMD in healthy young women.

    9. eccentric exercises can lead to exercise-induced muscle damage

      Eccentric resistance training can lead to EIMD, marked by reduced strength (MVC), muscle soreness (DOMS), and increased plasma markers (Mb).

    10. he study indicates that five consecutive days of CWI at 14°C significantly enhance recovery from exercise-induced muscle damage in the hamstrings.

      Both groups showed changes post-exercise, but the CWI group recovered faster and more significantly, especially in MVC, DOMS, SLR, and Mb levels. Five-day CWI at 14°C effectively improves recovery from EIMD in hamstrings.

    11. All the participants exhibited similar and significant responses in their MVC, DOMS, SLR, and plasma Mb concentration results after the EC test.

      EIMD induced via isokinetic eccentric contractions; variables measured include MVC, DOMS, SLR, and plasma myoglobin (Mb).

    12. This study investigated the effect of five consecutive days of cold-water immersion (CWI) on recovery from exercise-induced muscle damage (EIMD) in the hamstrings following maximal eccentric contraction (EC) exercise

      Evaluating whether cold-water immersion (CWI) over five consecutive days helps recovery from exercise-induced muscle damage (EIMD) in the hamstrings after maximal eccentric contractions.

    1. CWI had no effect on next-day HIIE performance, suggesting that post-exercise CWI does neither improve nor impair subsequent HIIE performed 24 h later.

      No effect on next-day neuromuscular performance.

    2. At high frequencies of stimulation, a prolongation of action potentials would impair the ability to propagate the subsequent action potentials when there is only a brief duration between stimuli, whereas low frequencies would have long durations between stimuli and would not be impacted by small changes in action potential depolarization and repolarization durations

      High-frequency torque and RTD impaired → CWI may hinder rapid force production. Relevant for sports requiring repeated maximal efforts in short time frames (e.g., track, rugby).

    3. would recover quicker following CWI

      Peripheral fatigue was confirmed due to unchanged voluntary activation. Temperature-dependent mechanisms: Lower muscle temp = slower calcium handling, longer relaxation time (↑ HRT). Lower temp can impair action potential propagation and high-frequency contraction. Force fusion: Despite prolonged HRT, no increase in 10 Hz torque suggests CWI didn’t improve submaximal force.

    4. When considering the effects of post-exercise CWI on subsequent HIIE performed 24 h later, no differences were seen in either the pre-exercise recovery of neuromuscular function or performance achieved between the two conditions during exercise.

      No difference between groups. Suggests CWI effects wear off long before next-day exercise. Previous conflicting findings may stem from: Different performance tests (e.g., sprints vs. HIIE). Differences in muscle groups or sport-specific contexts.

    5. . In addition, it has been shown previously that psychological factors can have an influence on participant MVC force. Specifically, when participants performed either thermoneutral water immersion, CWI

      No consistent effect in literature; possibly influenced by: Muscle group used. Exercise type (isometric vs. dynamic). Placebo effect: Belief in recovery modalities may impact voluntary strength.

    6. no difference in the mean total number of contractions performed, peak velocity achieved, or peak torque measured

      No difference in performance (contractions, velocity, torque) between groups on Day 2.

    7. 10:50-Hz torque ratio

      CWI group recovered low-frequency torque faster than RT → suggests CWI may protect against prolonged low-frequency fatigue (PLFFD), but effect is modest.

    8. a significant difference between the two groups on RTD was seen at 0.5 h (p = 0.005) (Figure 4a). Lastly, HRT was not different within each intervention throughout the 24 h recovery period

      RTD lower in CWI, especially early. HRT longer in CWI → slower muscle relaxation; possibly due to lower muscle temperature.

    9. a significant difference between the two groups on RTD was seen at 0.5 h (p = 0.005) (Figure 4a). Lastly, HRT was not different within each intervention throughout the 24 h recovery period

      RTD lower in CWI, especially early. HRT longer in CWI → slower muscle relaxation; possibly due to lower muscle temperature.

    10. 10 Hz torque remained impaired for up to 3 h following both interventions (RT: 8.9 ± 4.0 N·m; CWI: 8.3 ± 2.8 N·m), with full recovery 24 h later (RT: 11.3 ± 4.3 N·m; CWI: 10.2 ± 2.0 N·m) (Figure 3a). In addition, no differences were seen between the interventions throughout the 24 h period. Regarding 50 Hz torque, it was impaired for up to 1 h in RT (16.2 ± 8.1 N·m; p = 0.001), whereas following CWI, 50 Hz torque remained impaired for up to 3 h (14.9 ± 6.0 N·m; p = 0.001)

      10 Hz: Recovered by 24 h in both; no difference. 50 Hz: Slower recovery in CWI → supports idea that CWI impairs high-frequency contractile function.

    11. RTD was significantly reduced in both conditions (RT: 48.4 ± 23.6 N·m/s; CWI: 31.0 ± 15.5 N·m/s), with a significant difference between them (p = 0.04) (Figure 4a). The 50 Hz HRT increased significantly in both conditions (RT: 0.22 ± 0.06 s; CWI: 0.34 ± 0.13 s), with a significant difference between them (p = 0.04)

      Both worse in CWI → CWI slows muscle contractility and relaxation.

    12. Data within the text, figures, and tables are presented as means ± SD. Statistically significant differences were determined at p < 0.05.

      Standard threshold for determining statistically meaningful differences.

    13. The interval nature of the exercise involved six sets of 30 s all-out contractions with 3 min of rest between sets

      Mimics a real-world high-intensity interval session.

    14. Participants were recreationally active and not participating in organized sport at the time of testing.

      Ensures consistency but limits applicability to trained or elite populations

    15. the aim of this study was to investigate the effects of CWI on the post-exercise recovery of neuromuscular function following acute HIIE performed in the lower leg

      If CWI helps early recovery and next day performance, this is useful in sports when you have to play back-to-back.

    16. prolonged low-frequency force depression (PLFFD)

      This is an impaired submaximal force production; it is mostly caused when Ca2 is handled in your muscles. You use this daily.

    17. CWI is proposed to aid in the recovery of exercise performance by attenuating several exercise-induced responses such as inflammation and perceived muscle soreness and/or pain via muscle cooling [4-6] and the hydrostatic effects of CWI restricting local blood circulation and fluid shifts

      Your body’s temperature is reducing as well as your blood flow, which could minimize muscle damage or swelling.

    18. CWI at 10°C does not enhance post-exercise recovery or next-day exercise performance

      The main point is that CWI does not provide a significant benefit other than just resting.

    19. Cold-water immersion (CWI) has become a widely adopted method for post-exercise recovery.

      Ice baths are popular in athletic training settings, but their benefits are uncertain.