Fitwill
記錄運動、追蹤進度、增強力量。
用 Fitwill 達成更多：探索超過5000個附有圖片和影片的運動，獲取內置及自訂訓練計劃，無論健身室或家中都適用，見證真正成果。
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Strengthen your lower back and core with this effective workout including lower back curls, elbow lifts, plank arm lifts, and iron cross planks.
Home | Single Workout | Beginner: 4 exercises