" F7 v; Z% q1 ^" Y+ ^. r& Q; p 「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。' L+ k; }* n; p4 ^. s. g& Y1 T
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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。 # i- ?* T1 A' x( ? 8 l$ K: x/ R' ?1 Z! H 报导說，性爱就像任何的体能活动，会增加心跳速率及血压，代表心脏必须更卖力运作。因此，性爱引发心脏毛病的风险，与相同强度体能活动引发心脏病的风险是一样的。, ], C5 F0 w. q5 H U* u5 Z! M
; l4 q4 P m: l9 R& A3 l职场偷情 ~4 [3 ?, [9 p' K, ]2 V . v: d# \( y! m/ ?2 S 8 y9 K8 z$ U3 H& B3 T: gAdulterers beware... it could raise your risk of heart attack 23rd March 2011 2 w7 H5 E1 i6 C1 C1 c- H }/ ?: ^; A+ Z/ i3 M/ O- h* `; U- |6 b' Q
Having a fling or one-night stand is already a risky business. But now there is another reason for adulterers to worry. " A; a) R4 ]- u5 Q5 ?8 D1 k " \6 r% g9 M8 ^/ S3 m4 tThey are probably more at risk of having a heart attack.4 g- z8 ^; n0 Z8 }+ b! x0 ~
( d; y& g6 t* |2 Q$ jOccasional sexual activity is much more likely to cause a heart attack than regular sex, researchers have found.8 G7 I( _6 D6 Y4 Y# D+ o# J
) D2 |' V% O+ C; `- r8 d) CThe short-term risk of having a heart attack increases almost three-fold among those who rarely make love. 1 L) b+ q3 Z5 A2 v) j. t# c& `- m/ S3 E4 R! t: H
Those who have sex more often reduce the risk of it causing a heart attack – which means happily married couples could have the advantage. 9 B4 Q8 Z( s& k" L2 ~' S! Q6 C* h1 c" M
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. ! z$ @: W! x; p- X 4 W0 \- g% V" H' I2 E3 x# z& tOverall, there is a 3.5 times higher risk of such activity triggering a heart attack. 7 T' v) _% O& P0 ^# \ : M6 K, J3 g7 g' z" m0 QThe risk after ‘episodic’ sexual activity – the kind associated with affairs and one-night stands – is 2.7 times higher.3 p/ L1 e" N* `5 N
) u* m2 k8 W8 m- `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. {: p `: r1 b/ i# O
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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./ Z( D5 L- @( |' t9 n3 h- T
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The 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. * s' O5 @# B( s0 y" f! V; u! M9 {" \" B; M) F9 z9 W2 e9 b3 o) I
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. ! E! T7 l. S i' C9 d 4 d& T# h; M7 g7 W! n' g/ J+ @% B' }+ hThe higher risk during activity is then offset by a lower ‘everyday’ background risk for people who are fitter because they are more active.7 \- ?. t% e( u; K9 c
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Amy 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.0 ~$ L/ y1 O! r- {* I6 R$ U
( j! H, A4 D [ w2 z'The study shows sex can act as a trigger, but this doesn’t change our viewpoint on the health benefits of physical activity. t' v$ v' [) K% d, A- h5 h9 C; v1 z8 M
‘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 B7 i7 b" N* g0 I0 A( i
# n6 I7 I$ R2 k$ K; G9 e* M5 ]2 r# L( ^'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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