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. 2011;66(12):2079-84.
doi: 10.1590/s1807-59322011001200013.

Muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty

Emmanuel Gomes Ciolac  1 , Júlia Maria D'Andréa Greve
Affiliations

Muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty

Emmanuel Gomes Ciolac et al. Clinics (Sao Paulo). 2011.

Abstract

Objectives: To analyze muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty.

Methods: Twenty-three community-dwelling women were divided into the following groups: older, with knee osteoarthritis and total knee arthroplasty in the contralateral limb (OKG; N= 7); older, without symptomatic osteoarthritis (OG; N= 8); and young and healthy (YG; N= 8). Muscle strength (1-repetition maximum strength test) and exercise intensity progression (workload increases of 5%-10% were made whenever adaptation occurred) were compared before and after 13 weeks of a twice-weekly progressive resistance-training program.

Results: At baseline, OKG subjects displayed lower muscle strength than those in both the OG and YG. Among OKG subjects, baseline muscle strength was lower in the osteoarthritic leg than in the total arthroplasty leg. Muscle strength improved significantly during follow-up in all groups; however, greater increases were observed in the osteoarthritic leg than in the total knee arthroplasty leg in OKG subjects. Greater increases were also seen in the osteoarthritic leg of OKG than in OG and YG. The greater muscle strength increase in the osteoarthritic leg reduced the interleg difference in muscle strength in OKG subjects, and resulted in similar posttraining muscle strength between OKG and OG in two of the three exercises analyzed. Greater exercise intensity progression was also observed in OKG subjects than in both OG and YG subjects.

Conclusions: OKG subjects displayed greater relative muscle strength increases (osteoarthritic leg) than subjects in the YG, and greater relative exercise intensity progression than subjects in both OG and YG. These results suggest that resistance training is an effective method to counteract the lower-extremity strength deficits reported in older women with knee osteoarthritis and total knee arthroplasty.

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Conflict of interest statement

No potential conflict of interest was reported.

Figures

Figure 1
Figure 1
Muscle strength (1-RM test) increase after 13 weeks of resistance training. OKG: Older knee osteoarthritis and total knee arthroplasty group. OG: Older control group. YG: Young control group. OA: Lower limb with knee osteoarthritis. TKA: lower limb with total knee arthroplasty. a denotes significant difference between TKA and OA legs (p<0.05).
Figure 2
Figure 2
OA (p<0.05). b denotes significant difference from YG (p<0.01).- Relative workload increase curves. OKG: Older knee osteoarthritis and total knee arthroplasty group. OG: Older control group. YG: Young control group. a denotes significant difference from OKG - OA (p<0.05). b denotes significant difference from YG (p<0.01).
See this image and copyright information in PMC

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