Biodensity / Osteostrong core pull technique issues

I’ve been going to Osteostrong for 8 sessions so far and my core pull is the only exercise where my results are extremely erratic. Date Lbs 1/31/2020 5 2/7/2020 230 2/17/2020 184 2/27/2020 178 3/5/2020 208 10/20/2020 169 5/3/2021 251 5/10/2021 158 5/17/2021 166 5/24/2021 163 My best result was on 5/3/2021 after not going…
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