Long Covid causes changes in body that make exercise debilitating – study

Experts say severe muscle damage, mitochondrial problems and microclots may explain impact of working out

Many people with long Covid feel tired, unwell and in pain for lengthy periods after exercise, and researchers say they now know why.

Experts say they have evidence that biological changes are to blame, such as severe muscle damage, mitochondrial problems and the presence of microclots in the body.