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Openai/69486354-4ee4-8006-9478-7b28182d0eff
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==== Vou traduzir sua pergunta assim: “Se eu quero ter aos 80 força suficiente para tarefas básicas (compras, levantar e sentar), quanto de ‘reserva’ eu preciso aos 50 para compensar o declínio esperado?” ==== Como o declínio acelera depois dos 60, um modelo simples e realista é: * 50 a 60: perde 10% * 60 a 70: perde 15% * 70 a 80: perde 15% PMC<ref>{{cite web|title=PMC|url=https://pmc.ncbi.nlm.nih.gov/articles/PMC4968829/|publisher=pmc.ncbi.nlm.nih.gov|access-date=2025-12-22}}</ref> Cálculo (força relativa, sem unidade): * Força aos 80 = Força aos 50 × 0,90 × 0,85 × 0,85 * 0,90 × 0,85 = 0,765 * 0,765 × 0,85 = 0,65025 Então: * Força aos 50 necessária = Força-alvo aos 80 ÷ 0,65025 * 1 ÷ 0,65025 = 1,538 Resposta prática: * Aproximadamente 54% mais forte aos 50 do que o mínimo que você quer ter aos 80, para “neutralizar” esse padrão de perdas. Faixa plausível (para você ter noção do intervalo): * Se a queda média fosse 10% por década de 50 a 80: 0,9³ = 0,729, e 1 ÷ 0,729 = 1,37, ou seja, 37% a mais. AHA Journals<ref>{{cite web|title=AHA Journals|url=https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.123.064071|publisher=AHA Journals|access-date=2025-12-22}}</ref> * Se fosse 15% por década de 50 a 80: 0,85³ = 0,614, e 1 ÷ 0,614 = 1,63, ou seja, 63% a mais. PMC<ref>{{cite web|title=PMC|url=https://pmc.ncbi.nlm.nih.gov/articles/PMC4968829/|publisher=pmc.ncbi.nlm.nih.gov|access-date=2025-12-22}}</ref>
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