, T4 {: O. |$ {1 N- z' m 「美国医学会期刊」（Journal of the AmericanMedical Association）刊出的评论报告說，不论是在性行为或体能活动方面越活跃的人，心脏病发的风险就越低。! e# N3 P0 o. C; Q6 A4 f
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美国塔弗兹大学医学中心（Tufts Medical Center）及哈佛大学公共卫生学院（Harvard School ofPublic Health）的研究人员强调，实际因性爱引起心脏病发的人数并不多。: c7 j0 x7 f) U5 ]) O5 L F
0 P p) E. y4 I6 r- `7 RAdulterers beware... it could raise your risk of heart attack 23rd March 2011 3 a* ]/ W: H! l; N8 t% z n: o3 T! F/ M0 n ]; _+ q) S1 ZHaving a fling or one-night stand is already a risky business. But now there is another reason for adulterers to worry.( q b9 {7 F% ^* p9 S
* ?, U" |( P- }( f: e, C- B# D* MThey are probably more at risk of having a heart attack., N @$ o) B. H) U
# C8 |! K7 J# w2 \3 MOccasional sexual activity is much more likely to cause a heart attack than regular sex, researchers have found. . F0 J; s/ a7 P Q4 U0 |( W5 [$ k. I- ]6 U7 F: Z# J: ]1 t8 v
The short-term risk of having a heart attack increases almost three-fold among those who rarely make love. 5 w. w2 k2 ~% y: \4 R2 D- h7 J2 }3 @2 E3 U) ?2 g
Those who have sex more often reduce the risk of it causing a heart attack – which means happily married couples could have the advantage. ( }% t* G6 M3 m& Y8 u. F5 {( N( O
A review of 14 studies of heart attacks found the heart is under strain during any form of ‘episodic’ physical activity – something an individual only does rarely. * K3 ~2 o/ ]- Y- _5 J! }. v+ U+ U- T0 _( |8 b/ A. H
Overall, there is a 3.5 times higher risk of such activity triggering a heart attack. 8 R4 G8 n) g- K) Q! K Z) W5 c) i) I" {- F
The risk after ‘episodic’ sexual activity – the kind associated with affairs and one-night stands – is 2.7 times higher.1 O ]0 r& d* T, F0 }9 z
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But the more active an individual is, either sexually or physically, the lower the risk falls, said the review in the Journal of the American Medical Association. : B3 _5 P3 y* o1 `6 {" ?7 A6 d1 g/ {0 G5 F( g
The relative risk of heart attack caused by a burst of activity falls by around 45 per cent for each additional time a person indulges in it a week. The risk of sudden cardiac death also falls by 30 per cent. X, i6 k# }0 y+ V9 Y
" y9 N7 y- j9 N' `1 RThe researchers, from the Tufts Medical Centre and Harvard School of Public Health, stress that the number of heart attacks actually caused by sex will be low.( ?2 N I! [. s, C' k1 K1 O* t
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Like any physical activity, sex can increase the heart rate and blood pressure, which means the heart has to work harder. As a result, sex carries the same risk of triggering heart trouble as equally energetic forms of physical activity.! u9 d9 Y* k3 E
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The higher risk during activity is then offset by a lower ‘everyday’ background risk for people who are fitter because they are more active.6 \8 y3 Y: I$ D0 h9 G e1 h
& c8 u; _" s# s8 uAmy Thompson, senior cardiac nurse at the British Heart Foundation, said: ‘It’s important to distinguish between what causes a heart attack, and what potentially triggers it. % G& q8 W: J3 R9 \ / V" ]$ V2 j5 N& j w# S'The study shows sex can act as a trigger, but this doesn’t change our viewpoint on the health benefits of physical activity.6 B* E- b# K- t: x- {& Z
8 d: M. u6 F2 l‘To help keep your heart healthy you should aim to do 30 minutes of moderate-intensity activity, such as a brisk walk or gardening, at least five times a week.8 R) D; `1 [; S5 F. ^8 b3 M: I4 b
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'Sex places no more stress on the heart than climbing a couple of flights of stairs, so people with or without heart disease need not avoid it.’
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