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行動 vs. 不行動の後悔

定期的に運動するか、座りがちな生活を送るか

行動した場合

定期的に運動する

5.0%

行動しなかった場合

運動せず座りがちに過ごす

67%

それぞれの選択を後で後悔した人の割合。バーと完全な記録は下に表示されます。


健康

最終確認 2026-04-26

証拠の質 3.63/5

8次元のレビュー評価。基準は 品質ルーブリック 。各次元は1〜5で評価。

D1 出典の検証
4/5
D2 出典の権威性と独立性
4/5
D3 後悔率の正確性
1/5
D4 出典の比較可能性
2/5
D5 ギロヴィッチ・パターン
5/5
D6 文章の質
5/5
D7 注意事項の完全性
5/5
D8 サンプルの質
3/5
平均 3.63/5
A pair of running shoes next to an empty couch, one brightly lit and the other in shadow.
代替データ — この決断に関する直接的な後悔調査は存在しません。比率は後悔を直接尋ねる質問ではなく、満足度スコアとアクセス障壁のデータから導出されています。以下の注意事項を参照してください。

行動への後悔

定期的に運動する

5.0%

約5%(予期的後悔代替指標、反転)

カナダの大学生、便宜サンプル

前向き、予期的後悔(遡及的ではない)

不作為への後悔

運動せず座りがちに過ごす

67%

高齢者の約52%が運動しなかったことを後悔(運動特有代替指標)

65歳以上の米国成人

遡及的、固定期間なし

この選択を後悔した割合

inaction dominates — 不作為が優勢 — 多くは行動しなかったことを後悔しています。

関連する決断

意味的に類似する決断 — 同じ領域、異なるトレードオフ。

健康

禁煙

この選択を後悔した割合

不作為が優勢

不作為の後悔が90.0倍高い

健康

長寿追求 vs 老化受容

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.5倍高い

lifestyle

先延ばし

この選択を後悔した割合

不作為が優勢

不作為の後悔が4.7倍高い

lifestyle

マスターベーション vs NoFap

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.0倍高い

lifestyle

菜食主義

この選択を後悔した割合

行動が優勢

行動の後悔が3.8倍高い

lifestyle

自己成長 vs 惰性

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.5倍高い

健康

ティーンとして喫煙を始めること

この選択を後悔した割合

行動が優勢

行動の後悔が36.0倍高い

lifestyle

Get an allotment

この選択を後悔した割合

不作為が優勢

不作為の後悔が4.8倍高い

A 2023 ClearMatch Medicare/OnePoll survey of 2,000 Americans aged 65+ found that roughly two-thirds (~67%) regret not taking their health more seriously when younger. Exercise is the #1 ignored doctor’s advice in the same survey (21%), ahead of nutrition (16%), scheduled appointments (13%), and medications (12%) — the single largest named lapse within that broader regret figure, though the survey does not report a regret rate isolated to exercise alone. On the action side, no published survey directly asks regular exercisers “do you regret exercising?” — the question barely arises because exercise-action regret is treated as near-zero in the literature. The best available proxy comes from Rhodes and Mistry (2016), who found that 95% of university students anticipated they would regret missing physical activity, leaving roughly 5% indifferent — though this measures anticipated regret about inactivity, not retrospective regret about having exercised. Roese and Summerville’s meta-analysis of regret-ranking studies confirms the broader temporal pattern: regrets of inaction persist longer than regrets of action, because they remain psychologically open.

The pattern maps cleanly onto Gilovich and Medvec’s temporal model: in the short term, the hassle of getting to the gym dominates; in the long term, the failure to have maintained a habit dominates. Retirees do not lie awake wishing they had skipped fewer workouts. They lie awake wishing they had shown up.

The main limitation is measurement asymmetry. The action-side 5% is an anticipated-regret proxy from a small convenience sample (n=120 Canadian undergraduates), while the inaction-side 67% comes from retrospective surveys of US retirees and measures general health regret rather than a rate isolated to exercise specifically. These populations differ in age, country, and framing, and the 67% should be read as a general-health proxy for exercise-related regret — not a directly surveyed exercise-only rate. Still, the directional finding — that sedentary regret dwarfs exercise regret — is consistent across every survey in the literature and is unlikely to reverse under any reasonable reweighting.

出典: 行動

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

  1. [1] Frontiers in Psychology — Understanding the Reasons behind Anticipated Regret for Missing Regular Physical Activity
    Understanding the Reasons behind Anticipated Regret for Missing Regular Physical Activity
    統計値
    95% of participants anticipated regret for missing regular physical activity; only 5% did not
    抜粋
    “"95% of participants expressed that they would regret not being active and gave a total of 357 reasons. The dominant theme (69%) was a missed opportunity to obtain the benefits of PA, followed by shame/guilt for not being able to follow-through with one's goals or self-categorized role (28%)." ”
    出典データ
    2016-05-10
    アクセス日
    2026-04-26
    計算過程
    Rhodes & Mistry (2016) primed 120 Canadian university students on the public health definition of physical activity and measured ANTICIPATED regret for missing exercise. 95% anticipated regretting inactivity. We invert this: 5% expressed indifference toward missing exercise. IMPORTANT: this is anticipated regret about NOT exercising, not retrospective regret about HAVING exercised. It is an anticipated-regret proxy from a small convenience sample (n=120, undergraduates). No published survey directly measures the share of regular exercisers who regret exercising; the literature uniformly treats exercise-action regret as near-zero, but without a direct measurement.
  2. [2] Personality and Social Psychology Bulletin (PMC) — What We Regret Most ... and Why
    What We Regret Most ... and Why

    See all 14 Likelier entries citing this source →

    統計値
    Across a meta-analysis of regret-ranking studies, regrets of inaction persist longer than regrets of action
    抜粋
    “"the top six biggest regrets in life center on (in descending order) education, career, romance, parenting, the self, and leisure ... regrets of inaction persist longer than regrets of action." ”
    出典データ
    2005-09-01
    アクセス日
    2026-04-26
    計算過程
    Roese & Summerville (2005) meta-analysis of 11 regret-ranking studies of American adults. Health is NOT a top-six regret domain in this paper (education 32.2%, career 22.3%, romance 14.8%, parenting 10.2%, self 5.5%, leisure 2.5%; health ranks lower). The relevant finding for this entry is the general action/inaction asymmetry: regrets of inaction persist longer than regrets of action because they remain "psychologically open." This supports the directional inaction-dominates pattern (regretting not having exercised outlasts regretting having exercised) but does not report any exercise-specific percentage.

出典: 不作為

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

  1. [1] ClearMatch Medicare / OnePoll — Majority of seniors regret not prioritizing their health when they were younger
    Majority of seniors regret not prioritizing their health when they were younger
    統計値
    Approximately two-thirds of Americans aged 65+ regret not taking health more seriously when younger; 81% admit their health could be better; exercising frequently is the #1 ignored doctor advice (21%)
    抜粋
    “"81% of seniors polled admit their health could be better, despite the average respondent exercising about five times per week. Approximately two-thirds of Americans aged 65 and older express regret for not having taken their health more seriously during their younger years." ”
    出典データ
    2023-09-15
    アクセス日
    2026-07-07
    計算過程
    ClearMatch Medicare commissioned OnePoll to survey 2,000 Americans aged 65+ (August–September 2023). The survey reported "approximately two-thirds" (67%) regret not taking health seriously -- used directly as regret_rate. Exercise is the #1 ignored doctor advice at 21%, ahead of nutrition (16%), scheduled appointments (13%), and medications (12%), confirming exercise is the single largest named lapse within the 67% figure, but the survey does not report a regret rate isolated to exercise alone. A prior version of this entry derived an "exercise-only" estimate via 67% × (21/(21+16+other)) ≈ 52%, which is mathematically impossible: with other ≥ 0, that formula's own maximum (at other=0) is 21/37 × 67% ≈ 38%, well below 52%, and the now-confirmed additional ignored-advice categories (appointments 13%, medications 12%) push the true ceiling of that approach lower still (21/62 × 67% ≈ 23%). Since no published breakdown isolates exercise-specific regret, this entry now reports the directly-surveyed 67% general health-regret figure instead of a fabricated derivative.
  2. [2] MedicareFAQ — Retirement Regrets of Seniors: What You Can Learn from Their Mistakes
    Retirement Regrets of Seniors: What You Can Learn from Their Mistakes
    統計値
    Over 60% of retirees report making significant Medicare planning mistakes (enrollment timing, coverage gaps, long-term care) that cost them thousands of dollars -- this page does not survey health-specific or exercise-specific regret
    抜粋
    “"Over 60 percent of retirees report making significant Medicare planning mistakes that cost them thousands of dollars." ”
    出典データ
    2026-04-08
    アクセス日
    2026-07-07
    計算過程
    This URL was previously cited here for a MedicareFAQ retirement- regrets survey (1-in-4 retirees regret retiring; health listed as a top regret category). Re-fetching the live page found different content: it is now titled "Retirement Regrets of Seniors: What You Can Learn from Their Mistakes" (byline dated 2026-04-08) and covers Medicare enrollment/coverage-gap planning mistakes -- over 60% of retirees affected -- with no health-regret or exercise-regret survey data. The prior claim that this source "corroborates health as a top regret category" does not match the page's current content and has been removed accordingly. This source is retained only as general retirement-mistake context; it does NOT corroborate and is not used in deriving the 67% regret_rate, which rests solely on the ClearMatch Medicare/OnePoll survey above.

注意事項

The action-side 5% is a doubly indirect proxy: Rhodes & Mistry measured anticipated regret for MISSING exercise (not retrospective regret about having exercised), then we inverted it (those who did not anticipate regret). This is an anticipated-regret proxy from a small convenience sample (n=120 Canadian undergraduates), not a nationally representative survey measuring actual retrospective regret. No published study directly asks regular exercisers whether they regret exercising; the literature uniformly treats exercise-action regret as near-zero but without a direct measurement. Roese & Summerville's regret-ranking meta-analysis finds that regrets of inaction persist longer than regrets of action in general, which is consistent with but does not directly establish the 5%. The inaction- side 67% is the ClearMatch Medicare/OnePoll survey's directly-reported general health-regret figure, not an exercise-isolated rate -- exercise is simply the single most commonly named specific lapse within it (the #1 ignored doctor's advice at 21%, ahead of nutrition at 16%, scheduled appointments at 13%, and medications at 12%). A prior version of this entry attempted to isolate an exercise-only share via 67% × (21/(21+ 16+other)) ≈ 52%, but that derivation is mathematically impossible (its own maximum, at other=0, is roughly 38%) and no published breakdown actually isolates exercise-specific regret, so this entry now reports the direct 67% instead. Sample populations differ substantially (Canadian undergraduates vs US retirees), so the delta should be read as directionally strong rather than precisely calibrated. Survey data are drawn predominantly from United States samples; satisfaction and regret rates in countries with different institutional structures — consumer norms, gym membership culture, and public exercise infrastructure — may differ substantially.

生データ: /api/decisions.json

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