Hi guys,
you may find this research interesting:

Shevchuk NA. Possible use of repeated cold stress for reducing fatigue in chronic fatigue syndrome: a hypothesis. Behavioral and Brain Functions. (2007) vol.3, p. 55

Vaile J, Halson S, Gill N, Dawson B. Effect of Hydrotherapy on Recovery from Fatigue. International Journal of Sports Medicine. (2007) DOI: 10.1055/s-2007-989267

Huttunen P, Kokko L, Ylijukuri V. Winter swimming improves general well-being. International Journal of Circumpolar Health. (2004) vol.63, issue 2, pp. 140-144

Flensner G, Lindencrona C. The cooling-suit: case studies of its influence on fatigue among eight individuals with multiple sclerosis. Journal of Advanced Nursing. (2002) vol.37, issue 6, pp. 541-550

Verducci FM. Interval cryotherapy and fatigue in university baseball pitchers. Research Quarterly for Exercise and Sport. (2001) vol.72, issue 3, pp. 280-287

Verducci FM. Interval Cryotherapy Decreases Fatigue During Repeated Weight Lifting. Journal of Athletic Training. (2000) vol.35, issue 4, pp. 422-426

Roundy ES, Cooney LD. Effectiveness of rest, abdominal cold packs, and cold showers in relievng fatigue. Research Quarterly. (1968) vol.39, issue 3, pp. 690-695

Pratusevich IuM, Shustruiskaia LN. Change in the cortical and subcortical reactions in children during mental fatigue and its elimination by means of cold and muscular work. Gigiena i Sanitariia. (1962) vol.27, pp. 103-109