Call me crazy. After a night of sometimes watching those late CONCACAF Champions League matches, I will awake at 5:30am and get in my workout to start the day. During my core/aerobic hour-long workout, there are two parts that challenge me the most. First, I will just say I sweat the wait for the bell that ends my 15-minute elliptical session.
The second notable challenge is the rotational split squat.
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It is not the splitting of the legs into a squat at the end that is most difficult.