Muscle stress areas

Dressage

Horse:
Poll, cheek (masseter), neck (brachiocephalic), back (longissimus dorsai), muscles of the forearm (brachial biceps, pectorals, carpal and digital extensors), loins, hamstring group, hind adductors.

Rider:
Upper back, shoulders, base of neck, lower back, quadriceps, outer side of calf muscles

​Showjumping

Horse:
Poll, mid neck (splenius), shoulder (infra and supra spinatus), behind elbow (thoracic ventral serrated), muscles of the forearm (brachial biceps, pectorals, carpal and digital extensors), hamstring group, hind adductors, hind extensors.

Rider:
Shoulders, lower back, hips, gluteals, quads, calf muscles.

Cross Country

Horse:
Neck (brachiocephalic), shoulder (infra and supra spinatus), behind elbow (thoracic ventral serrated), muscles of the forearm (brachial biceps, pectorals, carpal and digital extensors), back (longissimus dorsai), hamstring group, hind adductors, hind extensors, femoral quadriceps.

Rider:
Shoulders, upper back, mid back (through erector spinae, lower back, hips, top of gluteals.