槓鈴深蹲 Barbell Back Squat

16週複合抗阻訓練顯著提升1RM蹲舉力量，軀幹伸肌為關鍵穩定肌。 16 weeks of compound resistance training significantly increased 1RM squat strength, with trunk extensors as key stabilizers.

複合抗阻計畫顯著增加骨骼肌量與蹲舉力量，深蹲對軀幹伸肌有顯著等長需求；豎脊肌為穩定角色。 A compound resistance program significantly raised skeletal muscle mass and squat strength; squatting imposes substantial isometric demand on trunk extensors, with erectors as stabilizers.

多項 EMG 研究確認臀大肌參與，但一項 6 週研究顯示初學女性無臀肌增長，只有股四頭增長。可能需要更長訓練期 Multiple EMG studies confirm glute max involvement, but one 6-week study showed no glute growth in novice women (p>0.05), only quad growth. May need longer training duration

多項研究顯示深蹲對股四頭肌四個頭都有顯著增肌效果（VL效果最大，）。深蹲產生極高的膝關節負荷（23-27倍體重），確保股四頭肌為主要動力。踵墊高或平底姿勢可最大化股四頭肌激活。 Multiple studies show squats produce significant hypertrophy across all four quad heads (VL most responsive, ES=1.37-1.74). Squats generate extremely high knee joint forces (23-27x BW), ensuring quads are primary movers. Heel-elevated or flat positions maximize quad activation.

深蹲產生最高的膝伸展淨關節力矩，自由重量深蹲的力量增長具有高度專項性。訓練模態專一性研究顯示，深蹲訓練對深蹲1RM的提升效果優於機械式訓練。 Squats produce the highest knee-extension net joint moments. Free-weight squat training shows superior strength gains in squat 1RM tests due to training modality specificity.