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One of the 
 commented on his research and the 
 of sleeping times on our heart. He said the results of his 
 suggested that going to bed early or 
, "may be more likely to disrupt the body clock" and be bad for 
 health. He said it was healthier for our body to wake up to the 
 light. He said: "The riskiest time [to go to bed] was after 
 because it may reduce the 
 of seeing morning light, 
 resets the body clock." He added that we risk heart disease if our body clock is not reset 
.