Why stairs are demanding
Unlike level walking, stair ascent raises the centre of mass against gravity while balance must be controlled on a relatively small base of support.
The idea of reserve
If maximal capacity decreases, the same stair can consume a larger proportion of the available muscular reserve.
Up and down are different
Ascending requires positive mechanical work; descending requires controlled braking. One direction may therefore feel harder than the other.
Established evidenceFactual statements are grounded in the publications listed below.
KŌMØ perspectiveKŌMØ favours a multidimensional, longitudinal reading of mobility.
LimitsThis page is educational and does not replace medical assessment when a change is recent, marked or accompanied by other symptoms.
References
- Startzell JK, et al. Stair negotiation in older people: a review. J Am Geriatr Soc. 2000.
- Samuel D, et al. The biomechanical functional demand placed on knee and hip muscles of older adults during stair ascent and descent. Gait Posture. 2011.
- Liu CJ, et al. Role of Resistance Training in Mitigating Risk for Mobility Disability in Community-Dwelling Older Adults: A Systematic Review and Meta-analysis. Arch Phys Med Rehabil. 2022.