Today is Day 4 of 21 for the SGPT plank challenge.
Do plank on hands for 50 seconds. Tomorrow we will add 10 seconds.
If you cannot do the amount of time listed – then go as long as you can and mark down your time (example 12 seconds).
Elite athletes can add a weight vest.
Post up your time for plank in the comments below.
Any questions? Post up below in comments
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SGPT Plank Challenge Day 5 of 21
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