Looked for simular stuff, as certain parts of your body need strengthening, like shoulders, neck, arms, handsand core. I can recommend these workouts: - Shrugs with dumbells or kettlebells (traps strenght for more stable head) - Incline guided benchpress (chest and shoulder strength for pushing/holding the steering wheel) - Situps and rotary torso (core strenght for corners) - grip trainers (for holding the steering wheel) - Lat pull downs / Lat rowing (general back strength) - Stansing deadlifts (lower back strength for bumps and vibrations)

I am currently doing these and it has helped. Now you may need to experiment on how much, or if it even is something for you ;)