He-he, mye rar forskning på dette det siste året med alle mulige angrepsvinkler, bokstavelig talt. Sjekk ut dette (du blir sterkere i venstre legg selv om du bare stretcher høyre!). Men legg merke til at det er ganske mye stretching i dette tilfellet.
Medicine & Science in Sports & Exercise: Volume 34(5) Supplement 1 May 2002 p S287
A TEN WEEK STRETCHING PROGRAM INCREASES STRENGTH IN THE CONTRALATERAL MUSCLE.
Nelson, A G.1; Kokkonen, J1; Arnall, D A. FACSM1; Kalani, W1; Peterson, K1; Kenly, M1
1Louisiana State Univ, Baton Rouge, LA; Brigham Young Univ-Hawaii, Laie, HI; Northern Arizona Univ, Flagstaff, AZ.
It is well established that unilateral strength exercise will also improve the strength of the contralateral muscle group. This cross training phenomenom is most prevalent when the strength training program consists of eccentric exercises.
PURPOSE:
Since eccentric work also includes a significant stretching componentand long term stretching programs can also improve strength, it was questioned whether a unilateral stretching program would induced a cross trining effect in the contralateral muscle.
METHODS:
To test this, 7 males and 6 females participated in a 10 week program of right calf stretching. The right calf muscle was stretched 4 times for 30 s, with a 30 s rest between stretches, 4 days per week for the 10 weeks. Strength was measured before and after the stretching program using a one repetition maximum (1RM) unilateral standing toe raise.
RESULTS:
The 1RM results (mean kg ± s.d.) are as follows: Pre-Right = 36 ± 8; Post-Right = 46 ± 9†‡ Pre-Left = 36 ± 7; Post-Left = 40 ± 10†. Where † denotes post > pre (p < 0.05), and ‡ denotes right > left (p < 0.05).
CONCLUSION:
This indicates that 10 weeks of stretching the right calf only will significantly increase the strength of both calves. Hence, stretching can also induce a crosstraining effect. Since stretching can activate spinal reflexes, the above finding supports the hypothesis that the cross training mechanisms reside in the spinal column.
