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Table 6 Description of the included systematic reviews; number of original studies included, population, intervention and control. Resistance exercises

From: Summarizing the effects of different exercise types in chronic low back pain – a systematic review of systematic reviews

Authors (year)

Number of RCT’s included in systematic review (SR) /meta-analyses (MA)

Population

Number of subjects, definition of LBP, pain duration, % women, age

Intervention

Descriptive

Control

Descriptive

Kristensen et al. (2012) [13]

SR: 12

MA: 0

Number of subjects: 549

Definition: NR

Duration: NR

% Women: NR

Age: mean 47 yrs (SD 7.3)

Resistance training, not further specified

Training period:

At least 4 wks, not further specified

NR

Scharrer et al. (2012) [64]

SR: 2

MA: 0

Number of subjects: 63

Definition: Pain in the area of the back from the lower ribs to gluteal folds, with or without radiation to the legs. Not to be caused by neurological reason

Duration: ≥ 12 wks

% Women: NR

Age: NR

Fully or not fully comply with ACSM guidelines for endurance and resistance training

Training period: 3 times/wk; 30–50 min/session, 70% 1RM 15–18 reps

No treatment or cognitive behavior intervention

Training period: 10–12 wks. Not further specified

Weinhardt et al. (2001) [39]

SR: 7

MA: 0

Number of subjects: N.R.

Definition: NR

Duration: NR

% Women: NR

Age:mean 47 yrs (SD 7.3)

NR

Training period: NR

Passive treatments, no treatment, flexibility exercises, fitness training

Training period: N.R.

  1. Abbreviations: ACSM The American College of Sports Medicine, LBP Low Back Pain, min Minutes, NR Not reported, reps Repetitions, RM Repetition Maximum, SD Standard deviation, VAS Visual Analogue Scale, wks Weeks, yrs Years