スティーブ・クックのインスタグラム(stevecook) - 1月30日 10時34分

Great core, chest, tricep and lat movement-
Single arm pushups with a slider. One of the tougher movements when done correctly.
Keeping a TIGHT CORE, extend one arm in front while controlling the eccentric party movement with the other arm. Push yourself back up to the start position slow and under control, then switch.
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