New signings like former All Black Brendon Leonard and ex-Wales No.8 Gareth Delve have been putting in the hard yards at the club's Llandarcy training base over the past few days.
And with the GUINNESS PRO12 season looming on the horizon in September, Claxton says there will be no let up.
"The majority of the players have turned up in reasonable nick," Claxton told Wales Online. "Our challenge and the information we give to players is to try and ensure they don't lose the gains they've made throughout the year during their break.
"For the most part we're pretty happy. It's an opportunity to build a bit of a base and get some work in that we're going to draw on during the season.
"Generally speaking, there's a lot of strength work, trying to build base aerobic capacities and those core development priorities early on before we progress to more specific work."
With the World Cup also taking place from September, Ospreys have moved quickly to boost their squad having provided so many players to Wales' cause.
Last year's GUINNESS PRO12 semi-finalists have looked to fill the void left behind by the likes of Rhys Webb and Alun Wyn Jones, and Claxton is happy with the quality brought in.
"There's a spread of players in terms of the way they come, their training age and their development priorities, so we need to look at those individually," added Claxton.
"This year with the World Cup, we've got some older players coming in to compliment our squad so we'll be careful of the load that they're exposed to.
"On the same token, we've got some younger guys who have been promoted who probably haven't developed accumulative tolerance to the load, so we've got to be careful with them too.
"It's a period where they get to work hard and express themselves but we're still trying to make some core gains, that's for sure."
Follow us on Facebook, join the conversation on Twitter, sign up to our YouTube channel for extensive match highlights and sign up for our newsletter for regular updates on the GUINNESS PRO12
Guinness PRO12 Ospreys News
63x46.png){kind=logo}