Hormonal
Repeated morning resistance training can blunt the typical diurnal variation in strength performance, effectively increasing morning strength to match afternoon levels.
If you are forced to train in the morning due to schedule constraints, do not worry about the 'afternoon peak' myth. Consistent morning training will adapt your body, increasing your morning strength to levels comparable to the afternoon. The key is consistency; your body will adjust its circadian strength rhythm to match your training schedule.
However, the diurnal variation in strength performance can be blunted by a repeated-morning resistance training protocol.
Why this rating
Based on cited studies (Souissi et al., Sedliak et al.) within a review.
Source
INTERACTIONS OF CORTISOL, TESTOSTERONE, AND RESISTANCE TRAINING: INFLUENCE OF CIRCADIAN RHYTHMS
Lawrence D. Hayes et al. · Chronobiology International · 2010
DOI 10.3109/07420521003778773
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- Late-afternoon physical performance (strength, power, flexibility) is generally superior to morning performance due to increased core body temperature enhancing peripheral mechanisms like nerve conduction and blood flow.Good
- Late-afternoon resistance training elicits greater hypertrophy and strength adaptations than morning training due to a higher exercise-induced testosterone response, despite higher baseline morning testosterone levels.Moderate
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