Best Exercises by Hamstring Region
The hamstrings are not one uniform muscle group. Different exercises bias different regions and functions:
Biceps femoris long head (BFLH) → lateral hamstring, sprint-related, most commonly injured
Semitendinosus (ST) → medial hamstring, heavily recruited in Nordics
Semimembranosus (SM) → deep medial hamstring, hip-extension dominant
Biceps femoris short head (BFSH) → knee-flexion only muscle
The strongest evidence comes from EMG systematic reviews plus MRI/fascicle studies.
1. Best Exercises for Biceps Femoris Long Head (lateral hamstring)
This is the “sprinting hamstring.”
Best choices
45° Hip Extension (ham bias)
Romanian Deadlift (RDL)
Single-Leg RDL
Stiff-Leg Deadlift
Lunge variations
Roman chair hip extension
Why
Hip-dominant exercises consistently show greater BFLH contribution compared with Nordic curls. Several papers found the 45° hip extension produced one of the highest BF-to-medial hamstring activation ratios.
Clinical implication
If someone:
strains hamstrings during sprinting,
lacks top-end speed,
has chronic lateral hamstring tightness,
or repeatedly injures BFLH,
they probably need more:
hip-extension loading,
long-length eccentric work,
and sprint-specific hinging.
Especially useful
RDLs at long muscle lengths
Single-leg RDLs
45° extensions with posterior pelvic tilt
2. Best Exercises for Semitendinosus (medial hamstring)
This muscle absolutely lights up during Nordics.
Best choices
Nordic Hamstring Curl
Nordic with dorsiflexion
Nordic return variation
Slider leg curls
Kettlebell swings
Glute-ham raise
Why
Meta-analysis data shows significantly greater semitendinosus activation during Nordic hamstrings compared to biceps femoris.
The Nordic may be the single best exercise for:
semitendinosus hypertrophy,
eccentric strength,
fascicle lengthening,
and strain prevention.
Clinical implication
Great for:
return-to-sprint progression,
ACL prevention,
deceleration athletes,
field sport athletes.
3. Best Exercises for Semimembranosus
This muscle seems to prefer heavy hip-extension work at longer lengths.
Best choices
Romanian Deadlift
Stiff-Leg Deadlift
45° Hip Extension
Single-leg deadlift
Sprint drills
Heavy hinge isometrics
Why
The semimembranosus contributes strongly to hip extension and appears more active during long-length hinge patterns than pure knee-flexion patterns.
Clinical implication
Useful for:
proximal hamstring tendinopathy,
deep posterior hip pain,
sprint mechanics,
acceleration power.
4. Best Exercises for Biceps Femoris Short Head
This muscle only crosses the knee.
Best choices
Leg curls
Nordic curls
Slider curls
Seated leg curl
Prone leg curl
Isokinetic knee flexion
Why
Since it does not cross the hip, hip hinges won’t fully train it. Knee-flexion exercises are required.
Prone curls may bias biceps femoris more strongly than Nordics.
Practical Programming
Best overall combo for COMPLETE hamstring development
1. Long-length hip hinge
RDL
Single-leg RDL
45° extension
Targets:
BFLH
SM
proximal hamstring
2. Knee-flexion eccentric
Nordic
sliders
glute-ham raise
Targets:
ST
BFSH
distal hamstring
3. Sprint exposure
accelerations
max velocity
wickets
bounds
Targets:
true functional integration
Foot Rotation Trick (Actually Supported)
Some EMG work suggests:
External foot rotation → more lateral hamstring (BF)
Internal foot rotation → more medial hamstring (ST/SM)
This appears most relevant during:
curls,
sliders,
seated/prone hamstring work.