Increased VO2max ( +13 % , P = 0.015 ) , VT ( +21 % , P = 0.001 ) , and left ventricular posterior wall thickness ( +18 % , P = 0.002 ) and reduced minute ventilation ( -12 % , P = 0.032 ) and blood lactate concentration ( -16 % , P = 0.025 ) during high-intensity exercise were observed after the training program compared with baseline .