My skiing/techno friend Dave W. alerted me to this video:
The Concept II double pole erg demoed at Craftsbury may make this home made adaptation unecessary. But if you’ve got an erg already…
 
 

Concurrent training enhances athletes’ strength, muscle endurance, and other measures.
Davis WJ, Wood DT, Andrews RG, Elkind LM, Davis WB.
Division of Physical and Biological Sciences and Strength and Conditioning Coach, Athletic Department, University of California at Santa Cruz, USA. jackson@MiracleWorkout.com
We evaluated the effects of concurrent strength and aerobic endurance training on muscle strength and endurance, body [...]

Click on the graph if you are interested to see more detail.
I drove 10 minutes to my favorite 6% grade, 1.6km hill with 312 feet of vertical climb and did 5 repeats aiming to keep it quick and as light as possible, using my V2 910 classic roller skis.
My energy was good and I only [...]

Disc degeneration, back and leg pain and general stiffness (after having been very flexible) led me to the local Baptiste (Hot, power yoga) studio on Mass. Ave, in Cambridge.
After 15 or so sessions since last spring I am a believer. Where else would you do 90 minutes of focused stretching, balance and core work in a [...]

I drove out to Mt. Wachusett today for a 3 hour distance workout. Driving out from Cambridge took 58 min, while driving back took only 50 min, as I realized I might be late picking up the kids from school! When I finished my 3:05 hour workout the mountain clocks said 2:30pm (kids out at [...]