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Studying for the CSCS Exam?

CSCS Prep Course: https://www.themovementsystem.com/str...

150 Question CSCS Practice Test: https://www.themovementsystem.com/off...

Rate of Force Development:    • Rate of Force Development Explained!  

Force = Mass X Acceleration
Force during a 100kg Barbell Back Squat: (simplified)
F= M X A
Force = 100 KG X 9.8 m/s^2
Force = 980 Newtons

Example with upward Acceleration of the Bar:
F = M X A
F = 100 KG X (9.8 m/s^2 + 0.8 m/s^2)
F = 100 KG X (10.6 m/s^2)
F = 1060 Newtons

Work = Force X Displacement
Work: (Constant Speed)
Work = Force X Displacement
Work = 980 Newtons X 1 meter
Work = 980 Nm
Work = 980 J

Power equation for barbell lift:
Power = Work/ Time
Power = 980 J / 2 sec
Power = 490 Watts
Power = 980 J / 4 sec
Power = 245 Watts

Forces produced during Jumping and Springint range from 200 N to 5,000 N in athletes

The highest power output is seen in Olympic lifting.

Optimal Load to maximize power may be 1050% 1RM based on strength of the lifter

Dugan, Eric & Doyle, Tim & Humphries, Brendan & Hasson, Christopher & Newton, Robert. (2004). Determining the Optimal Load for Jump Squats: A Review of Methods and Calculations. Journal of strength and conditioning research / National Strength & Conditioning Association. 18. 66874. 10.1519/15334287(2004)18 668:DTOLFJ 2.0.CO;2.

This study showed ~30% 1RM was optimal load for maximizing power during the squat jump.

Make sure you check out some of the other CSCS Prep Videos I have done:

CSCS Nutrition:    • CSCS Nutrition Calculations: Calories...  

CSCS Work to Rest Ratios:    • NSCA CSCS Work to Rest Ratio Explaine...  

Muscle Levers:    • Muscle Levers 1st Class, 2nd Class, 3...  

Olympic Lifting Technique:    • Olympic Lifting Technique: Snatch, Cl...  

Comment below if you have any questions!

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Disclaimer: This video does not have any affiliation with, or any recognition, sponsorship, or endorsement by, the NSCA. CSCS® and Certified Strength and Conditioning Specialist® are registered trademarks of the National Strength and Conditioning Association.

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