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Table 5 Mean values (SD) of x coordinates for experimental conditions Key: 3%: three per cent body weight, 5%: five per cent body weight. 10%: ten per cent body weight. T7: backpack positioned at the seventh thoracic vertebra. T12: backpack positioned at the twelfth thoracic vertebra. L3: backpack positioned at the third lumbar vertebra.

From: Adolescent standing postural response to backpack loads: a randomised controlled experimental study

  3% T7 3%T12 3%L3 5%T7 5%T12 5%L3 10%T7 10%T12 10%L3
tragus of ear 33.9 (34.1) 32.2 (34.4) 32.0 (34.2) 36.3 (34.2) 34.8 (34.4) 34.3 (34.1) 41.8 (33.9) 40.8 (34.1) 40.1 (33.9)
spinous process C7 1.8 (10.6) 0.6 (10.7) 0.6 (10.7) 4.0 (10.5) 2.9 (10.7) 2.5 (10.8) 9,2 (11.4) 8.3 (11.7) 7.6 (11.6)
mid acromion shoulder 15.2 (11.1) 16.0 (11.2) 16.6 (10.6) 18.7 (11.4) 17.8 (11.5) 18.6 (11.0) 21.7 (11.9) 23.1 (12.2) 23.5 (12.1)
lateral superior illiac crest 24.3 (9.2) 23.6 (9.0) 22.9 (9.2) 25.4 (9.6) 24.5 (9.4) 24.5 (9.3) 27.8 (9.3) 26.8 (9.4) 26.7 (9.2)
greater trochanter 21.7 (9.2) 21.5 (8.4) 20.7 (8.3) 22.8 (9.2) 22.4 (8.7) 22.6 (8.7) 25.1 (9.0) 24.7 (8.7) 24.8 (8.5)
mid joint knee 11.0 (7.5) 11.1 (7.5) 10.4 (7.4) 11.3 (7.7) 11.3 (7.6) 11.7 (7.4) 12.4 (7.7) 12.6 (7.7) 12.8 (7.4)