Resistance training taken to momentary muscular failure produces acute cardiorespiratory demand and chronic adaptations that overlap substantially with those attributed to steady-state aerobic exercise.
A review of acute physiological responses and chronic adaptations concluded that failure-based resistance training improves cardiovascular fitness measures in humans, challenging the strict separation of 'strength' and 'cardio' prescriptions.
Spaceflight research provides an unusually clean comparison. Analyses of countermeasures to microgravity-induced deconditioning evaluated resistance training against aerobic modalities and found resistance work addressed a broader range of deconditioning endpoints — muscle, bone, and cardiovascular — simultaneously.
For time-limited adults, this means a single well-executed strength session addresses more physiologic domains than the equivalent time spent on cardio alone.
Reviews the acute cardiorespiratory demand of resistance training taken to momentary failure and the chronic adaptations that follow, concluding that failure-based strength work improves cardiovascular fitness markers without separate aerobic training.
Evaluates exercise countermeasures used against spaceflight deconditioning, finding resistance training addresses muscular, skeletal, and cardiovascular decline simultaneously where aerobic modalities address a narrower set of endpoints.
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