LAB # 4:  KIN 2241B  Biomechanics Winter 2013

DUE:
give completed LAB assignment to either Ashley Hannon or Peter Wegscheider in any 2241B class prior to but no later than the class on Monday 8-Apr-2013. This is the only method of submitting your completed lab assignment. Late submission will not be accepted and a zero will be assigned.

FORMAT:Lab assignment must be typed on a standard sheet of paper (8.5" x 11") using type font size of 10. The report must not exceed two pages and if you require two pages to complete the assignment, it must be printed double-sided on one page (use a duplex mode printer or photocopier to get a one-page report). Note: a mark penalty will be assessed for any report on more than one sheet of paper.

ASSIGNMENT:
1. Using Western Student Recreation Centre Pool during free swim time periods (or any other pool you want), have a partner (or you) swim as outlined below in A, B, C, and D. You can start each swim with a push-off from the pool wall or by starting away from the wall and not using a push-off. Do not use a dive start. If you use the WSRC pool, the lane markers alternate black and white with each color 1 meter in length (swim the length of 4 sections > black/white/black/white and you have covered 4 meters).

A. Swim a specific distance (your choice, but at least 10 meters, could be more, your choice) using the front crawl stroke with the face/ head out of the water for the duration of the swim 

B. Swim the same distance as covered in A above, again using the front crawl stroke but now with the face/head in the water for the duration of the swim (if breathing is required, only roll head to one side and try not to lift it up) 

C. Swim as far as possible staying underwater using only the dolphin kick for propulsion (arms held out in front of the body in the direction of the swim but not used for propulsion,face down and head between outstretched arms). 

D. Swim that same distance as covered in C above but now staying on the surface (not submerged) using only the dolphin kick as in C above (same body positions) and covering the same distance as in C.

2. For A and B above, record the time (to the nearest ¹/_10thof a second) it takes the swimmer to cover the specified distance you have chosen (from the start of the push-off or start of swim if not using a push-off until swimmer reaches your specified point). 

3. Calculate the average stroke frequency and average stroke length of the swimmer in each of A and B. 

4. Discuss the reasons for the differences in the results found in A and B (time achieved, stroke frequency, stroke length, effort levels).

5. For C and D above, record the time (to the nearest ¹/_10thof a second) it takes the swimmer to cover the distance, starting from the start of the push-off until the head of the swimmer reaches that point). 

6. Discuss the reasons for the differences in results found in C and D (time achieved, effort levels).