The Next Day at the Gym You Notice a Short Chubby Guy Walk in That You Have Not Seen Before s1

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INTRODUCTION STATE THE PROBLEM: Does muscle size indicate muscle One day you’re in the gym and a freak of nature walks in. This strength? guy has massively ripped muscles from head to toe. As you watch the specimen, he approaches the squat rack. You begin HYPOTHESIS: If muscle size is greater, then strength will to get excited as he loads the bar in the squat rack. You are be greater. wondering how much this guy squats. He begins to go through his warm-up sets. He starts with 135 and then 225. He puts 295 on the bar and begins his decent. Guess what? He is stuck at PROCEDURE: Muscle Strength vs. Muscle Size the bottom. 1. Measure the circumference of the muscle in your forearm in centimeters and record in the Table 1. The next day at the gym you notice a short chubby guy walk in 2. Test your strength using the squeeze meter as instructed by that you have not seen before. You watch as he approaches the your teacher. squat rack. He begins to go through his warm-up sets. He starts 3. Record your strength in kilograms in Table 1. his warm-up sets with 135, then 225, and then 315. Your are 4. Also record your data on the class chart (Table 2.) very surprised. This guys physique development does not even 5. Graph the class results and compare them to the direct come close to the level of the freaks’ that was in the gym relationship line provided. yesterday. This guy is now squatting 405 with ease. Eventually he moves up to 500 lbs. for 3 reps. This is a common scenario. Table 1. Personal Data Circumference of How do we explain the chubby guy squatting more than the 30.0 cm Forearm (cm) lean muscular machine? Another example of this case is the Strength of comparison of powerlifters to bodybuilders. There is a 40.2 kg noticeable difference in physicque development. The Squeeze (kg) bodybuilders show supreme muscular and physicique development in comparison to the powerlifters; but powerlifters are usually stronger. There are numerous factors that contribute to the supreme strength displayed by the powerlifter.

*Excerpt taken from: http://www.bodybuilding.com/ Table 2. Class Data Title: Muscle Size vs. Strength – Period 8 Arm Grip Arm Grip Name Name Circ Strength Circ Strength (initials) (initials) (cm) (kg) (cm) (kg) 1. LM 30.0 cm 40.2 kg 14. LK 24.5 32.9

2. JC 23cm 17.8 15. MB 26.5cm 41.1kg

3. JB 27cm 35.2 16. MP 26 cm 38 Kg ) g k (

4. BM 23.0cm 30.8kg 17. JO 27 cm 48.3 kg H 5. MR 23.0cm 27.9kg 18. JL 29 cm 47.6 Kg T G N

6. GB 25.0cm 29.0kg 19. ED 25 cm 29.7 kg E R T S 7. MO 25.0cm 28.5kg 20. BH 24 cm 33.2 kg P I

8. GG 25.9cm 26.7kg 21. R G 9. NV 23cm 34.1kg 22.

10. GS 24cm 34.8kg 23.

11. MA 24cm 34.8kg 24.

12. CH 21.5 cm 30.6 25. 33.9 13. MD 24 cm 26. ARM CIRCUMFERENCE (cm)

1. Explain why your hypothesis was correct or incorrect. 2. Making Connections: What type of foods should you

eat to promote building lean muscles?