High-intensity sessions, with intermittent maximal effort, generate high heart rate spikes. This can overload a heart already weakened by age or with silent pathologies.
Sprints:
5 Exercises That Could Harm You in Old Age.
High-intensity sessions, with intermittent maximal effort, generate high heart rate spikes. This can overload a heart already weakened by age or with silent pathologies.
Sprints:
