Furthermore , vigour was significantly greater ( P = 0.04 ) the morning of day 2 in INT [ 5.3 ( 3.9-6 .7 ) ] compared to CON [ 2.8 ( 1.4-4 .2 ) ] , and subjective jet-lag symptoms and mood states were significantly worse on day 2 in CON only ( P < 0.05 ) .