6,45 KG left hand 20 cent coin lateral pinch grip lift with a bend arm

6,45 kilogram left hand, 20 cent coin lateral pinch grip lift with a bend arm.    Measurements of this 20 cent coin:   -Diameter  22.25 mm  -Thickness 2.14 mm  And: A 5 mm hole at 5 mm from the edge

Training for the hardest punches One very hard right straight power punch 2

Bending a free wrench with the bare hands

Boxing 3

Two drop right straights from standing

12,5KG+10,23KG hex dumbbell pinch grip lift, 2 fingers at the marks and 3 at the flat sides

Jeffrey Koelewijn 45 Speed training

Boxing training 2019 Only punches with left

JK (Jef Koelewijn) power training, contracting as many muscles as hard as possible

Jef Koelewijn boxing training Shadow boxing 69

12,73 KG plate curls with right x 6

Boxing training - Shadow boxing 29

Fighting sports Defence training and forearm toughening 6

Boxing training 2019 Straight punches speed punching drill

Boxing defense training Fast weaving 1 part 1

Very basic, architectural learning and studying with sand lime bricks 3

Jeffrey Koelewijn boxing training 62 Shadow boxing

Power training Contracting as many muscles as hard as possible 18

12,5 KG hexagonal dumbbell pinch grip front raise hold for around 1,5s

door Jeffrey Koelewijn