On the road, forgot your Modahl

This isn't obviously quite the same as some static or super-slow on the PRO or Modahl, but highlights the evidence of quality training you achieve with Isometric training

Barak, Y., M. Ayalon, and Z. Dvir (2004). "Transferability of Strength Gains from Limited to Full Range of Motion". American College of Sports Medicine. 36(8):1413-1420.

Isometric is when you hold the muscle position still, contracting it against another force.
a.) eg the classic wall sit.

I recommend you try and achieve 100 secs of work per exercise.
a.) Break it into portions if need be
b.) just keep the intensity!

This is a great workout for inside a hotel room, even in the bathroom of the hotel room for more privacy if you're sharing the room.

Keep it short and intense

Juice!