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Table 1 The BFR-LLST protocol for the knee-extension exercise [11, 28, 29]

From: Blood flow restriction added to usual care exercise in patients with early weight bearing restrictions after cartilage or meniscus repair in the knee joint: a feasibility study

Variables

Knee-extension exercise

Load, repetition maximum

30 (~ 20–40% of 1RM)

Repetitions per set

≤ 6 weeks: 30, 15, 15, max. 30a

>  6 weeks: 30, 15, 15, 15

Sets per session

4

Rest between sets, seconds

30–45

Sessions per week

5

Duration of the experimental period, weeks

Approximately 9 weeks; 3 weeks without and 6 weeks with external loads

Contraction modes, seconds

1 isometric, 2 eccentric, 2 concentric

Rest between repetitions, seconds

0

Time under tension, seconds

≤ 6 weeks: 450 (5 seconds x (30 + 15 + 15 + 30 reps))

>  6 weeks: 375 (5 seconds x (30 + 15 + 15 + 15 reps))

Contraction failure in each set

No, only the last set out of 4a

Range of motion, degrees

Max. 90

Rest between training sessions, hours

24 to 48 hours

Anatomical definition of the exercise (exercise form)b

Yes

Mode per week

≤ 6 weeks: 3 times supervised in total, 4–5 times at home.

>  6 weeks: 2 times supervised, 3 times at home.

Cuff application

As proximal as possible on the lower limb

Cuff type (materials)

20-cm width (Supervised with cuff; Home with elastic band).

Occlusion pressure

Cuff: 80% limb occlusion pressure (LOP). Elastic band: Should be as tight as the cuff corresponding to 80% LOP.

BFR-LLST total training time (total time under tension), seconds

≤ 6 weeks: 585 (450)

>  6 weeks: 510 (375)

Duration of the entire BFR-LLST session

Max. 10 minutes twice per week (supervised) and max. 10 minutes 3 times per week at home.

  1. aPatients started the BFR-LLST without external load the first six weeks postoperatively due to weight-bearing restrictions and the number of repetitions were limited to 30 in the fourth and final set
  2. bAn anatomically perfect technique to allow efficient “delivery” of load to the muscle