Mixed
Power training (high-velocity resistance training) is superior to traditional strength training for maintaining lumbar spine BMD in postmenopausal women.
If you do resistance training, don't just lift slowly. Incorporate 'power' moves where you lift the weight quickly (but with control) using heavy weights (70-90% of your max) for few reps (around 6). Do this 4 times a week. This specific type of training has been shown to better maintain bone density in the spine than slow, traditional weightlifting.
After 2 years of training, women submitted to PT [Power Training] maintained lumbar spine BMD, while ST [Strength Training] lost 2.4%. The authors concluded that power training might be superior to strength training to maintain BMD in postmenopausal women.
Why this rating
Based on a specific RCT cited (Stengel et al.), within a review paper.
Source
Physical exercise and osteoporosis: effects of different types of exercises on bone and physical function of postmenopausal women
Linda Denise Fernandes Moreira et al. · Arquivos Brasileiros de Endocrinologia & Metabologia · 2014
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →