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Table 1 Descriptive characteristics of included studies

From: Is moderate resistance training adequate for older adults with sarcopenia? A systematic review and network meta-analysis of RCTs

Study and Year

Age (years)

M/F

Intervention

Intervention type

Intensity of resistance exercise

Comparison Group

Duration

Sarcopenia Outcomes

Alemán-Mateo et al. (2012) [34]

76 ± 5.4

17/23

Dietary protein supplement

Nutrition

–

Habitual diet and exercise

3 months

Muscle mass, handgrip strength

Bellomo et al. (2013) [35]

70.9 ± 5.2

40/0

Global sensorimotor training, resistance training, focused vibrational therapy

RT

Vigorous

Usual daily habits concerning diet, social relations and physical activity

12 weeks

Maximal force contraction of the lower limbs; static and dynamic balance confidence

Papanicolaou et al. (2013) [36]

75.9 ± 6.9

0/170

Selective androgen receptor modulator (MK-0773) with protein and vitamin D supplement

Drug

–

Placebo tablet with protein and vitamin D supplement

6 months

Gait speed, SPPB, muscle mass

Liu et al. (2014) [37]

77.5 ± 4.2

8/25

Mixed aerobic, strength, balance, and flexibility training

AT, RT

Moderate

Health education

12–18 months

Gait speed, SPPB, sarcopenia status

Bauer et al. (2015) [38]

Intervention: 77.3 ± 6.7

Control: 78.1 ± 7.0

131/249

Whey protein and vitamin D supplement

Nutrition

–

Iso-caloric control product without protein

13 weeks

Muscle mass, handgrip strength, gait speed, SPPB, chair-stand test

Zdzieblik et al. (2015) [39]

72.2 ± 4.68

53/0

Collagen protein supplement and resistance exercise

Nutrition, RT

Vigorous

Placebo supplement and resistance exercise

3 months

Muscle mass, muscle strength

Cramer et al. (2016) [40]

77 (71, 81)a

125/205

Oral nutritional supplement with 20 g protein

Nutrition

–

Oral nutritional supplement with 14 g protein

6 months

Leg strength, body weight, muscle mass, handgrip strength, gait speed

Kemmler et al. (2016) [41]

Electromyostimulation: 77.3 ± 4.9

Electromyostimulationand protein: 76.4 ± 2.9

Control: 77.4 ± 4.9

0/75

Whole-body electromyostimulation and protein supplement

Electromyo-stimulation, nutrition

–

No treatment

26 weeks

ASMI, gait speed, grip strength

Kim et al. (2016) [42]

Exercise and Nutrition: 80.9 ± 4.2

Exercise: 81.4 ± 4.3

Nutrition: 81.2 ± 4.9

Control: 81.1 ± 5.1

0/139

Amino acid supplement, tea, and mixed aerobic and resistance exercises

Nutrition, AT, RT

Mild

Health education

3 months

Muscle mass, knee extension strength, handgrip strength, walking speed

Maltais et al. (2016) [43]

Control: 64 ± 4.5

EAA supplements: 64 ± 7.8

EAA milk: 68 ± 5.6

26/0

Protein supplement and resistance exercise

Nutrition, RT

Vigorous

Placebo oral supplement and resistance exercise

4 months

Muscle mass, muscle strength, TUG, chair stand test

Maltais et al. (2016) [44]

65 ± 5

26/0

Protein supplement and resistance exercise

Nutrition, RT

Vigorous

Placebo oral supplement and resistance exercise

4 months

Body composition

Maruya et al. (2016) [45]

Intervention group: 69.2 ± 5.6

Control group: 68.5 ± 6.2

23/29

A 6-month home exercise programs, combining walking with lower limb resistance exercises

AT, RT

Mild

Usual care

6 months

Body mass index, skeletal mass index, body fat percentage, handgrip strength, single-leg standing, walking speed (comfortable and maximal), and knee extension strength, quality of life (EQ-5D)

Rondanelli et al. (2016) [46]

Dietary supplement group: 80.77 ± 6.29 Placebo group: 80.21 ± 8.54

53/77

Nutritional supplementation with whey protein (22 g), essential amino acids (10.9 g, including 4 g leucine), and vitamin D [2.5 m g (100 IU)] concurrent with physical activity (RT + balance and gait training)

Nutrition, RT

Moderate

Physical activity (RT + balance and gait training)

12 weeks

Body composition, muscle strength, blood biochemical indexes of nutritional and health status, and global nutritional status, physical function, quality of life (SF-36)

Vasconcelos et al. (2016) [47]

Exercise: 72 ± 4.6

No exercise: 72 ± 3.6

0/28

Resistance exercise

RT

Moderate to vigorous

No exercise intervention

10 weeks

Knee extensor strength, SPPB, gait speed, quality of life (SF-36)

Chen et al. (2017) [48]

Aerobic: 68.9 ± 4.4 Resistance: 69.3 ± 3.0

Combination: 68.5 ± 2.7

Control: 68.6 ± 3.1

10/50

Aerobic exercise, resistance exercise, or combined aerobic and resistance exercise

AT, RT

Moderate

No exercise intervention

2 months

Body composition, handgrip strength, knee extensor strength

Huang et al. (2017) [49]

Exercise: 68.89 ± 4.91

Control: 69.53 ± 5.09

0/35

Resistance exercise

RT

Moderate

Health education

3 months

Body composition

Kemmler et al. (2017) [50]

Electromyostimulation and protein: 77.1 ± 4.3

Protein: 78.1 ± 5.1

Control: 76.9 ± 5.1

100/0

Whole-body electromyostimulation and protein

Electromyo-stimulation, nutrition

–

No treatment

4 months

Body composition, ASM/BMI, handgrip strength

Liao et al. (2017) [51]

CG: 68.42 ± 5.86

EG: 66.39 ± 4.49

0/46

Elastic band resistance training

RT

Moderate

–

3 months

Fat-free mass, leg lean mass, absolute total fat mass, and body fat %, handgrip strength, muscle quality, single-leg stance, gait speed, TUG, and timed chair rise

Park et al. (2017) [52]

74.1 ± 6.1

0/50

Mixed aerobic and resistance exercise

AT, RT

Moderate to vigorous

Health education

6 months

ASM/weight, handgrip strength, 30-s chair stand test, maximum walking speed

Sammarco et al. (2017) [53]

55.0 ± 9.6

0/18

Low-calorie high-protein diet (1.2–1.4 g/kg body weight reference/ day obtained with the addition of 15 g daily of protein supplement)

Nutrition

–

Low-calorie diet plus placebo

4 months

Anthropometric measurements, body composition, resting energy expenditure, handgrip test, SPPB, quality of life (SF-36)

Wei et al. (2017) [54]

Low-frequency group: 78 ± 4

Medium- frequency group:75 ± 6

High-frequency group:74 ± 5

Control group:76 ± 6

24/56

Whole-body vibration (WBV) training

Vibration training

–

No training

Mid-intervention (week 6), post-intervention (week 12), mid-follow up (week18) and follow-up (week 24)

Muscle size, isometric and isokinetic knee extension strength measurements

Wei et al. (2017) [55]

Low-frequency group: 78 ± 4, medium- frequency group:75 ± 6, high-frequency group:74 ± 5, control group:76 ± 6

24/56

Whole-body vibration (WBV) training

Vibration training

–

No training

Mid-intervention (week6), post-intervention (week 12), mid-follow up (week18) and follow up (week24)

Five-repetition sit-to-stand, 10-m walking test with self-preferred speed and TUG

Berens et al. (2018) [56]

77.5 ± 5.4

80/69

Mixed aerobic and resistance activity program with protein and vitamin D nutritional supplement

Nutrition, AT, RT

Moderate

Physical activity program only

6 months

400 m walk capacity, quality of life (SF-36)

Chen et al. (2018) [57]

Exercise: 66.7 ± 5.3

No exercise: 68.3 ± 2.8

0/33

Kettleball resistance exercises

RT

Moderate to vigorous

No exercise intervention

2 months

Body composition, ASM, handgrip strength

Kemmler et al. (2017) [58]

Electromyostimulation and protein: 77.1 ± 4.3

Control: 76.9 ± 5.1

67/0

Whole-body electromyostimulation and protein

Electromyo-stimulation, nutrition

–

No treatment

4 months

Body composition, leg extension strength, gait speed

Liao et al. (2018) [59]

67.3 ± 5.1

0/56

Resistance exercise

RT

Moderate

–

3 months

Body composition, ASMI, handgrip strength, gait speed, TUG, 30-s chair stand test, SF-36 (physical functioning and physical component summary)

Piastra et al. (2018) [60]

Reinforcement training: 69.9 ± 2.7

Postural training: 70.0 ± 2.8

0/66

Muscle reinforcement training

RT

Mild to moderate

Postural training

9 months

Body composition, muscle mass, SMI, and handgrip strength

Tsekoura et al. (2018) [61]

72.87 ± 7.02

7/47

Muscle strengthening and balance exercises

RT

Moderate

Health education

3 months

Body composition, ASMI, handgrip strength, leg extension strength, quality of life (sarcopenia and Quality Of Life [SarQoL])

Zhou et al. (2018) [62]

Amino acid supplement: 68.80 ± 5.08

Electrical acupuncture and amino acid supplement: 70.35 ± 5.36

48/0

Essential amino acid supplementation with electrical acupuncture

Nutrition, acupuncture

–

Amino acid supplementation alone

3 months

Body composition, ASMI

Amasene et al. (2019) [63]

Exercise: 81.7 ± 6.45

Exercise and protein: 82.9 ± 5.59

14/28

Resistance exercise with protein supplement

Nutrition, RT

Moderate to vigorous

Resistance exercise with placebo supplement

3 months

Body composition, SPPB, handgrip strength

Bo et al. (2019) [64]

Protein supplement: 73.23 ± 6.52 Control: 74.83 ± 5.94

27/33

Protein, vitamin D, and vitamin E supplement

Nutrition

–

Iso-caloric control product without protein or vitamin D and E supplement

6 months

Muscle mass, handgrip strength, gait speed, chair stand test, TUG

Mafi et al. (2019) [65]

68.63 ± 2.86

62/0

Resistance exercise, epicatechin

Nutrition, RT

Moderate to vigorous

Placebo capsules and no exercise

2 months

ASMI, leg extension strength, TUG

Nabuco et al. (2019) [66]

Protein: 68.0 ± 4.2

Placebo: 70.1 ± 3.9

0/26

Whey protein and resistance exercise

Nutrition, RT

Moderate

Resistance exercise

3 months

Body composition, gait speed, 5 time chair stand, leg strength

Vikberg et al. (2019) [67]

70.9 ± 0.03

32/38

Resistance training

RT

Moderate to vigorous

No exercise intervention

10 weeks

Body composition, SPPB, TUG, chair sit-stand time

Yamada et al. (2019) [68]

84.2 ± 5.5

39/73

The combined resistance exercise and nutritional supplementation group, the exercise alone group, the nutritional supplementation alone group

Nutrition, AT, RT

Mild

Usual care

12 weeks

Measurement of echo intensity in thigh muscle, knee extension torque, skeletal muscle mass and phase angle, physical function

Zhu et al. (2019a) [69]

Control: 72.2 ± 6.6

Exercise: 74.5 ± 7.1

Exercise and nutrition: 74.8 ± 6.9

26/87

Mixed aerobic and resistance exercise, nutrition supplement

Nutrition, AT, RT

Mild

Maintain usual diet and activities

3 months

Body composition, gait speed, quality of life (SF-12 physical component score)

Zhu et al. (2019b) [70]

Taichi: 88.8 ± 3.7

Whole body vibration: 89.5 ± 4.4

Control: 87.5 ± 3.0

90/0

Taichi, whole body vibration

Taichi, vibration

–

Maintain usual diet and activities

2 months

Handgrip strength, lower limb strength, 6-m gait speed test, TUG, 5 s sit to stand test

Bagheri et al. (2020) [71]

E + R: 64.1 ± 3.3

R + E: 63.8 ± 3.6

C: 65 ± 3.9

30/0

Resistance training, endurance training, Resistance training plus endurance training

AT, RT

Vigorous

Control

8 weeks

Upper body strength, lower body strength

Björkman et al. (2020) [72]

Protein: 83.6 ± 4.7

Iso-caloric placebo: 84.0 ± 3.9

Control: 83.7 ± 5.1

70/148

Protein and vitamin D supplement, home based aerobic exercise

Nutrition, AT

–

Home based aerobic exercise

12 months

Handgrip strength, SPPB

Chang et al. (2020) [73]

79.3 ± 5.1

0/40

Elastic band resistance training

RT

Mild

No resistance exercise

3 months

SMI, handgrip strength, leg strength, gait speed

Liao et al. (2020) [74]

70.9 ± 7.3

0/40

Elastic band resistance training

RT

Moderate to vigorous

Health education

3 months

Body composition, gait speed, 30-s chair stand test

Oh et al. (2020) [75]

Antigravity treadmill: 76.94 ± 9.43

Conventional rehab: 81.15 ± 4.90

12/26

Antigravity treadmill and standard rehabilitation exercises

Rehabilitation exercise

–

Standard rehabilitation exercises

10 days

Handgrip strength, quality of life (EQ-5D)

Rooks et al. (2020) [76]

Bimagrumab: 79.5 ± 5.46

Placebo: 78.3 ± 5.03

71/109

Bimagrumab

Drug

–

Placebo

7 months

Body composition, SPPB, handgrip strength, 6-min walk distance, gait speed

Espinoza et al. (2021) [77]

67.5 ± 5.4

6/15

Intranasal oxytocin

Drug

–

Intranasal saline

2 months

Body composition, SPPB, TUG

Lee et al. (2021) [78]

Exercise: 70.13 ± 4.41

Control: 71.82 ± 5.23

0/27

Resistance exercise

RT

Moderate

Health education

3 months

Body composition, ASMI, handgrip strength, gait speed, TUG, 30-s chair stand test

Li et al. (2021) [79]

Nutrition: 70.04 ± 3.98

Exercise: 73.73 ± 5.69

Nutrition + Exercise: 71.52 ± 5.28

Control: 72.91 ± 6.29

70/99

Protein, vitamin D, and fish oil supplementation, mixed aerobic and resistance exercise

Nutrition, AT, RT

Vigorous

Routine consultation

3 months

Body composition, handgrip strength

Nasimi et al. (2021) [80]

Intervention: 71.0 (69.0, 73.5)a

Control: 69.0 (66.0, 75.5)a

50/16

Yogurt fortified with beta-Hydroxy beta-

Methyl Butyrate (HMB) and vitamins D and C

Nutrition

–

Plain yogurt

3 months

Body composition, handgrip strength, gait speed

Osuka et al. (2021) [81]

72.1 ± 4.3

0/156

β-hydroxy-β-methylbutyrate supplementation and resistance exercise

Nutrition, RT

Moderate to vigorous

Health education and placebo supplement

3 months

Body composition, handgrip strength, gait speed, TUG, 5-repetition sit-to-stand time

Seo et al. (2021) [82]

Exercise: 70.3 ± 5.38

Control: 72.9 ± 4.75

0/22

Resistance exercise

RT

Moderate to vigorous

No exercise intervention

4 months

Body composition, handgrip strength, gait speed

Lace study group et al. (2022) [83]

Perindopril/leucine:78.1 ± 5.5

Perindopril:79.5 ± 6.6 Leucine:78.6 ± 6.5

Placebo: 79 ± 5.7

67/78

Perindopril 4 mg, or oral leucine powder 2.5 g thrice daily

Drug

–

Placebo

12 months

SPPB, maximum grip strength, maximum quadriceps strength, six-minute walk distance, four metre walk speed, five times sit to stand test, instrumental activities of daily living, ASMI, quality of life (EQ5D-3 level version)

  1. ASM Appendicular skeletal muscle mass, ASMI Appendicular muscle mass index, SMI Total skeletal muscle mass index, SPPB Short Physical Performance Battery, TUG Timed up and go test, EQ-5D EuroQol five-dimensional questionnaire, SF-36 36-item Short-Form Survey, SF-12 12-item Short Form Survey
  2. aMedian (25th interquartile range, 75th interquartile range)