Nick Nilsson recently published an article over on Charles Staley's website about adding resistance to side planks.
Weighted Side Planks
It's a simple but effective description of how to use a dumbbell to weight your side planks if you don't have a vest - or if your weighted vest just doesn't let you set a high enough load.
サンドバッグに遊ばれるな（笑）…（水）キックボクシング初級＆一般クラス
17 hours ago
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