Changes in VOmax during the 8-week intervention were significant ( P < 0.01 ) in both groups ( HAIT , 8.7 3.2 ml kg ( -1 ) min ( -1 ) , 22.4 8.9 % ; CAT , 5.5 2.8 ml kg ( -1 ) min ( -1 ) , 14.7 9.5 % ) , while the VOmax improvement in HAIT was greater ( P = 0.02 ) than in CAT .