Strength vs Tabata

Tabata session has just finished, using a 3.2kg kettlebell and 2.5kg dumbbells.
Interestingly when I do a strength session I work with a 20kg and do the movements I did tonight, with little to no problem.

Tonight's session left my arms and shoulders burning, my body unable to get one last good pushup, struggling to shoulder press the 3.2kg weight...

Nothing like working to exhaustion in a 5 x 6 (5 exercise, 6 set) session of Tabata.

Consisted of:
Single arm swings
thrusters
Decline pushup
V situp
shoulder press

15 minutes flat out and I'm spent, so now time for dinner.

Tomorrow 5am tabata session (again) then running at 1630.