fireman216 wrote:...The main thing I would like to do is the 7 summits.
Now you've opened a can of worms. Do lots of other mountaineering first. Don't be the gumby putting your crampons on upside down at the base of Everest.
Think endurance and pain management. Do hills and stairs and long death marches with a 60lb pack on. Tons of elevation and plodding. Being able to handle long approaches is gold. Fill your pack with weight all wrong so that's it awkward and imbalanced.
Trail run. (Not with a pack, or say goodbye to your knees) Running builds cardio strength and distance running teaches your body to keep going, and going. Trail running is preferable to roads as it build stabilizer muscles.
Do other stuff with some body weight exercises, etc. Someone else can fill that in.