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Table 3 Muscle fiber type distribution (No), fiber diameter (Fdm) and nuclei-to-fiber ratio (N/F) before and after three months of follicular phase-based or luteal phase-based strength training (N = 9)

From: Effects of follicular versus luteal phase-based strength training in young women

  Pre-training Post-training
  FT LT FT LT
  Type Ι Type ΙΙ Type Ι Type ΙΙ Type Ι Type ΙΙ Type Ι Type ΙΙ
No (%) 40.9 ± 9.1 59.1 ± 9.1 41.8 ± 13.6 58.2 ± 13.6 40.3 ± 11.1 59.7 ± 11.1 40.5 ± 13.0 59.5 ± 13.0
Fdm (μm) 54.5 ± 5.1 45.8 ± 5.8 54.0 ± 7.4 46.8 ± 7.9 56.7 ± 7.1 52.5 ± 7.0* 57.0 ± 3.4 51.9 ± 7.3#
N/F 2.9 ± 0.4 3.4 ± 0.8 3.8 ± 1.1* 3.4 ± 0.7
  1. FT: follicular phase-based training, LT: luteal phase-based training, *: P <0.025 post-training versus pre-training, #: P = 0.045 post-training versus pre-training.