Conclusion Exercises and PA promotion according to public health recommendations  for PA improved cardiovascular fitness , muscle strength and PA behaviour , with moderate effect sizes in people with SpA , RA and HOA/KOA .
Objective To evaluate the effectiveness of exercise and physical activity ( PA ) promotion on cardiovascular fitness , muscle strength , flexibility , neuromotor performance ( eg , balance ) and daily PA in people with rheumatoid arthritis ( RA ) , spondyloarthritis ( SpA ) and hip/knee osteoarthritis ( HOA/KOA ) .
Effects of strength training on the incidence and progression of knee osteoarthritis.
OBJECTIVE Quadriceps weakness is a risk factor for incident knee osteoarthritis ( OA ) . We describe a r and omized controlled trial of effects of lower-extremity strength training on incidence and progression of knee OA . METHODS A total of 221 older adults ( mean age 69 years ) were stratified by sex , presence of radiographic knee OA , and severity of knee pain , and were r and omized to strength training ( ST ) or range-of-motion ( ROM ) exercises . Subjects exercised 3 times per week ( twice at a fitness facility , once at home ) for 12 weeks , followed by transition to home-based exercise after 12 months . Assessment s of isokinetic lower-extremity strength and highly st and ardized knee radiographs were obtained at baseline and 30 months . RESULTS Subjects in both groups lost lower-extremity strength over 30 months ; however , the rate of loss was slower with ST than with ROM . Compared with ROM , ST decreased the mean rate of joint space narrowing ( JSN ) in osteoarthritic knees by 26 % ( P = not significant ) . However , the difference between ST and ROM groups with respect to frequency of knee OA progression in JSN consensus ratings was marginally significant ( 18 % versus 28 % ; P = 0.094 ) . In knees that were radiographically normal at baseline , JSN > 0.50 mm was more common in ST than in ROM ( 34 % versus 19 % ; P = 0.038 ) . Incident JSN was unrelated to exercise adherence or changes in quadriceps strength or knee pain . CONCLUSION The ST group retained more strength and exhibited less frequent progressive JSN over 30 months than the ROM group . The increase in incident JSN > 0.50 mm in ST is unexplained and requires confirmation
Conclusion Exercises and PA promotion according to public health recommendations  for PA improved cardiovascular fitness , muscle strength and PA behaviour , with moderate effect sizes in people with SpA , RA and HOA/KOA .
Objective To evaluate the effectiveness of exercise and physical activity ( PA ) promotion on cardiovascular fitness , muscle strength , flexibility , neuromotor performance ( eg , balance ) and daily PA in people with rheumatoid arthritis ( RA ) , spondyloarthritis ( SpA ) and hip/knee osteoarthritis ( HOA/KOA ) .