After a vigorous gym session in Santa Monica, lovers Kate Hudson and Lance Armstrong gave their mouths a workout with a passionate kiss outside a fitness centre yesterday.

The smitten pair, who have attempted to keep their romance out of the spotlight, pawed one another in front of the public venue as they gave in with reckless abandon.

Tour de love: Kate Hudson and Lance Armstrong kiss outside a Santa Monica gym

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Passionate: The couple couldn't keep their hands off each other

It's the second time in a week they've struggled to keep their hands off each other - they were spotted kissing on a Brentwood tennis court during a doubles match on Sunday.

The seven-time Tour de France champion, who has previously romanced singer Sheryl Crow, fashion designer Tory Burch and actress Ashley Olsen, has so far dodged questions about his latest relationship.

During a recent appearance on US talkshow The View, he said: 'I know you have to ask that question . . . and it's my right not to answer it.'

Kate is also playing coy, saying: 'It's better to let ... people speculate as much as they want to speculate.'

Smitten: Kate and Lance, pictured here on Sunday, are now constant companions