Local cryostimulation acutely preserves maximum isometric handgrip strength following fatigue in young women |
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| Institution: | 1. Department of Experimental Medicine, University of Genoa, Genova, Italy;2. Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy;3. Metabolism Research Center, Endocrinology and Metabolism, IRCCS Policlinico San Donato, San Donato Milanese, Italy;4. IRCCS Istituto Ortopedico Galeazzi, Milan, Italy;1. University of Northampton, Park Campus, Boughton Green road, Northampton NN2 7AL, UK;2. Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK;3. Moulton College, West Street, Moulton, Northampton NN3 7RR, UK;4. University of Portsmouth, Winston Churchill Avenue, St James road, Portsmouth PO1 2UP, UK;1. Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China;2. Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China;3. Maternal and Child Health Hospital of Anhui Province, The Maternal and Child Health Clinical College, Anhui Medical University, Hefei, China;1. GRESPI, Research Group in Engineering Sciences, University of Reims, France;2. Cryotherapy Pole, Reims, France;3. Physical Medicine and Rehabilitation Department, Reims University Hospital, Reims, France;4. Regional Training Institute, Reims University Hospital, Reims, France;5. Department of Neurology, Reims University Hospital, Reims, France;6. Faculty of Sports Science, University of Reims, France |
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| Abstract: | Several types of cryostimulation have been recently proposed to rapidly lower skin temperature therefore gaining a possible neuro/muscular recovery after strenuous exercise or, more generally, in sports. Local cryostimulation may be a viable and relatively portable tool to obtain physiological benefits in previously-efforted muscular districts. However, cohesive and standardized cryo-exposure protocols are lacking as well as the righteous procedure to efficaciously combine duration, treatments and temperature in relation to desirable effects on muscular strength. In this randomized-controlled study, fifty young women were tested for maximum isometric handgrip strength, before and after exhausting contractions.Following the fatiguing protocol, the intervention group (cryo, n = 25, 24.7 ± 2.5 years, BMI 21.7 ± 1.8 kg/m2) underwent a 6-min local cryostimulation (?160 °C) on the extensor-flexor muscles of the dominant arm, while control-matched peers sat rested in a thermo-neutral room (22 ± 0.5 °C). Handgrip tests were repeated at baseline (T0), after cryostimulation (T1), and 15 min after T1 (T2). Throughout the protocol, the AUC of the strength performance was significantly higher in the cryo- compared to control group (P = 0.006). In particular, following fatigue and cryostimulation, the cryo group preserved higher strength at T1 with respect to controls (26.8 ± 2.8 vs 23.9 ± 2.8 kg, Bonferroni's post-hoc, P < 0.01). Likewise, ventral and dorsal temperature, recorded with a thermal camera, were lower in cryo- than control group (P < 0.0001).In conclusion, a brief session of local cryostimulation may acutely preserve maximal isometric force in young women following a fatiguing protocol. These findings may have implications in orchestrating strategies of district muscular recovery. |
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| Keywords: | Cryostimulation Local cryotherapy Handgrip strength Recovery Maximal isometric force AUC"} {"#name":"keyword" "$":{"id":"kwrd0040"} "$$":[{"#name":"text" "_":"area under the curve CWI"} {"#name":"keyword" "$":{"id":"kwrd0050"} "$$":[{"#name":"text" "_":"cold-water immersion ES"} {"#name":"keyword" "$":{"id":"kwrd0060"} "$$":[{"#name":"text" "_":"effect size ICC"} {"#name":"keyword" "$":{"id":"kwrd0070"} "$$":[{"#name":"text" "_":"intraclass correlation coefficient LC"} {"#name":"keyword" "$":{"id":"kwrd0080"} "$$":[{"#name":"text" "_":"local cryotherapy PBC"} {"#name":"keyword" "$":{"id":"kwrd0090"} "$$":[{"#name":"text" "_":"partial body cryotherapy RM"} {"#name":"keyword" "$":{"id":"kwrd0100"} "$$":[{"#name":"text" "_":"repeated measures 1-RM"} {"#name":"keyword" "$":{"id":"kwrd0110"} "$$":[{"#name":"text" "_":"one maximum repetition SD"} {"#name":"keyword" "$":{"id":"kwrd0120"} "$$":[{"#name":"text" "_":"standard deviation WBC"} {"#name":"keyword" "$":{"id":"kwrd0130"} "$$":[{"#name":"text" "_":"whole body cryotherapy |
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