Our new mode-comparison study (aerobic vs. resistance exercise) in young Black men, an understudied group at elevated cardiovascular risk, showed that:

-RE induces a more pronounced and sustained cardiovascular and autonomic strain during the early post-exercise period than AE

-This was characterized by elevated central afterload, reduced myocardial oxygen supply–demand balance, and delayed parasympathetic reactivation

-Mode differences occurred despite similar session duration and exercise HR between bouts

-While both modes are generally safe/recommended, exercise Rx should consider mode-specific recovery differences, particularly when central afterload or autonomic recovery is a consideration

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