trending towards significanceP = 0.09
However, one study [ 4 ] reported a 0.4° C increase in core temperature was trending towards significance ( P = 0.09).
However, one study [ 4 ] reported a 0.4° C increase in core temperature was trending towards significance ( P = 0.09).
Changes in performance were varied with a 100 m time-trial improvement of 0.6% [ 41 ], whereas practically significant improvements at the elite level of 0.8% in 50 m front-crawl was also were reported by another study [ 19 ], as per the smallest worthwhile change in Olympic level swimming being 0.3–0.4% [ 50 , 51 ].