Table 2 Descriptives on demographic variables, pain measurements, rate of perceived exertion and amount of assisted weight during the exercise. All values, expect sex and symptom site, are expressed by median and range. (HC = healthy controls; RLBP = recurrent low back pain; ncCLBP = non-continuous chronic low back pain; cCLBP = continuous chronic low back pain; BMI = body mass index; NRS = numeric rating scale; RMDQ = Roland Morris Disability Questionnaire; RPE = rate of perceived exertion; n = number; m = male; f = female; L = left; R = right; Bi = bilateral)
HC (n = 21) | RLBP (n = 23) | ncCLBP (n = 15) | cCLBP(n = 16) | |
|---|---|---|---|---|
Age (years) | 40 [20–55] | 27 [21–53] | 31 [20–45] | 50 [23–64] |
BMI (kg/m²) | 23 [18–30] | 23 [19,20,21,22,23,24,25,26,27,28,29] | 23 [20,21,22,23,24,25,26] | 24 [20–32] |
Sex | m = 9(43 %), f = 12(57 %) | m = 9(39 %), f = 14(61 %) | m = 7(47 %), f = 8(53 %) | m = 8(50 %), f = 8(50 %) |
Symptom site | L = 2(9 %), R = 4(17 %), Bi = 17(74 %) | R = 1(7 %), Bi = 14(93 %) | L = 2(13 %), R = 2(13 %, Bi = 12(74 %) | |
Duration of LBP (months) | 112 | 104 | 198 | |
Disability (RMDQ) | 0 [0–2] | 1 [0–6] | 5 [1,2,3,4,5,6,7,8,9,10,11] | 5 [1,2,3,4,5,6,7,8,9,10,11,12] |
Pain before exercise (NRS) | 0 [0–0] | 0 [0–1] | 1 [0–7] | 3 [0–8] |
Pain during exercise (NRS) | 0 [0–3] | 1 [0–6 ] | 3 [0–6] | 3 [0–8] |
Pain after exercise (NRS) | 0 [0–2] | 1 [0–4] | 2 [0–5] | 2 [0–8] |
Pain expected pain (NRS) | 1 [0–4] | 2 [0–5] | 3 [0–6] | 3 [1,2,3,4,5,6,7,8] |
RPE (Borg) | 9 [6,7,8,9,10,11,12,13,14] | 9 [6,7,8,9,10,11,12,13] | 11 [7,8,9,10,11,12,13] | 11 [6,7,8,9,10,11,12,13,14,15] |
Assisted weight | -18 [-26- -15] | -20 [-30 - -13] | -21 [-25 - -13] | -22 [-35 - -15] |