The Effects of Concurrent Aerobic and Strength Training on Muscle Fiber Hypertrophy: A Systematic Review and Meta-Analysis

Lundberg, Feuerbacher, Sünkeler, Schumann · 2022 · Sports Medicine 52(10):2391–2403

What this work gives Aellic

The fibre-level follow-up to schumann2022, and the one place where a small interference effect does show up: 15 studies, SMD −0.23 for overall muscle fibre hypertrophy (95 % CI −0.46 to −0.00; p = 0.050), −0.34 for type I (p = 0.078) and −0.13 for type II (p = 0.315). This is also the source for the running-versus-cycling difference: type I fibres were negatively affected when the aerobic work was running (SMD −0.81; 95 % CI −1.26 to −0.36) but not cycling. The authors call the contrast with whole-muscle findings “intriguing” rather than resolved.

Correction of 26 July 2026

The findings of this entry and of schumann2022 were the wrong way round. What stood here — no whole-muscle deficit, only explosive strength affected — is the result of schumann2022; this paper measures fibre size only and explicitly narrowed its protocol to that outcome. The whole-muscle sentence appears in its background, as a reference to the earlier work. The added condition “and only at high volumes” was in neither paper: the moderator that mattered in schumann2022 was same-session execution, not volume.

The entry on the register was wrong. It was not replaced but kept, with what holds instead standing next to it.

Where this sits in the engine

1 declared site: constants and thresholds in the code that point at this entry.

Training Muscle growth — sets per muscle 1 site

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