Mixed
Rate of force development (RFD) in the early phase of a rapid contraction (first 50–75 ms) is primarily determined by neural factors, specifically the capacity for maximal voluntary activation and increased motor unit discharge rate, rather than intrinsic muscle contractile properties.
To improve how quickly you generate force, focus on training your nervous system to activate muscles faster, not just making them bigger. This involves explosive movements and high-velocity training to increase motor unit discharge rates, especially in the first 50-75 milliseconds of effort.
Rate of force development (1) seems to be mainly determined by the capacity to produce maximal voluntary activation in the early phase of an explosive contraction (first 50–75 ms), particularly as a result of increased motor unit discharge rate
Why this rating
Based on a narrative review of multiple studies showing consistent associations between EMG/activation and RFD, though individual variability exists.
Source
Rate of force development: physiological and methodological considerations
Nicola A. Maffiuletti et al. · European Journal of Applied Physiology · 2016
DOI 10.1007/s00421-016-3346-6
More from this paper
- Explosive-type and heavy-resistance strength training can improve Rate of Force Development (RFD) in various populations, primarily by enhancing rapid muscle activation (neural adaptations).Good
- Intrinsic muscle properties (such as fiber type and contractile speed) become the primary determinant of Rate of Force Development (RFD) in the later phases of a rapid contraction (>75 ms), whereas neural factors dominate the early phase.Good
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