Whether physical exertion feels ‘easy’ or ‘hard’ may be due to dopamine levels, study suggests
Dopamine, a brain chemical long associated with pleasure, motivation and reward-seeking, also appears to play an important role in why exercise and other physical efforts feel “easy” to some people and exhausting to others, according to results of a study of people with Parkinson’s disease led by Johns Hopkins Medicine researchers. Parkinson’s disease is marked by a loss of dopamine-producing cells in the brain over time.
The findings, published online April 1 in NPG Parkinson’s Disease, could, the researchers say, eventually lead to more effective ways to help people establish and stick with exercise ...











