It’s tempting to treat a double-workout day as a make-it-work situation: Run when you can, strength train when you feel like it, and call both boxes checked. But there’s a rationale behind how runners should structure sessions to make the most of them.
Get the setup right and strength training can help you get more out of your running; get it wrong and you may tire yourself out before your important miles even begin.
Lifting before you run can result in slow splits during an interval session, sloppy mechanics on a tempo workout, or a recovery day that no longer feels particularly restorative. This concern is more than theoretical: In a recent study of 16 recreational runners, participants ran about 5 percent slower in a hard 8 x 200-meter interval workout after completing a bodyweight strength-training circuit, compared with those who did not strength train before their speed session.
The lesson is not to avoid strength training, but to treat the sequence, purpose, and recovery cost of those sessions as seriously as the workouts themselves.
Here’s how to structure strength-and-running days so your work in the gym supports faster, stronger miles.
How to Optimize Run-and-Lift Days
Two weekly strength sessions offer a “golden rule” for most runners, Matt Jones, a personal trainer, run coach, and founder of Run Strong Academy based in Cardiff, South Wales, previously told Runner’s World. For a high-mileage marathoner, lifting on the same day as a run can make this strength target manageable without turning every day of the week into a taxing training day.
Without doubles, a runner may slide strength work onto every non-running day, quickly erasing important recovery time and allowing fatigue to overtake their training. “There’s simply not enough time in the week to separate running and lifting, especially since you want to keep a rest day in there,” says Laura Norris, a Colorado-based RRCA-certified run coach, strength and conditioning specialist, and exercise scientist.
Norris offers an ideal weekly schedule for runners who regularly train five or six days a week: Start Monday with an easy run and strides, then lift. Keep Tuesday easy, then complete the week’s hard workout on Wednesday. You’ll fit in your second lift of the week on Thursday after your recovery run, and then log more easy miles on Friday. Do your Saturday long run, and then rest completely on Sunday.
On both double days, the running comes before the lift, so you don’t carry fatigue from the gym into even an easy or recovery run, Norris says. The schedule also pairs strength work with lower-intensity mileage, freeing the hard workout and long run from fresh post-lift fatigue. (For some people, it works to do a strength workout on the same day as hard run workouts, spaced hours apart.) As a result, you have the ability to train hard when the plan calls for it, then actually recover afterward.
Not every runner needs this exact schedule, Norris notes. But this format demonstrates how doubles can protect your most important workouts, instead of stacking unnecessary fatigue and potentially derailing your progress.
But squaring away your weekly calendar solves only half the problem. The actual strength work also needs to build qualities your run training does not.
What Those Strength Sessions Should Look Like
Many runners assume strength work should mimic their weekly miles: high reps, short rest, plenty of sweat. Norris believes the opposite.
Intervals, hills, and tempo efforts already challenge your body’s muscular endurance capabilities. High-rep strength circuits can pile more fatigue onto muscles and energy systems the runner has already taxed during their week of training, Norris explains. So while the athlete may finish both sessions just fine, the lift may offer little benefit beyond a second dose of exhaustion.
The smarter approach? “Most runners actually do best when they lift for either strength or hypertrophy [muscle building],” Norris says.
This generally means using moderate-to-heavy loads for roughly three to four sets of six to 10 reps, and including at least 60 seconds of rest between sets to maintain good form. This approach challenges the body differently than running does: You’re building muscular strength instead of simply layering on more endurance work.
Norris favors concise, total-body sessions built around major movement patterns: squatting, hinging (think: deadlift), pushing, and pulling. She also suggests challenging the calves. Lifts should leave room for quality running later in the week, rather than creating soreness that lingers into the next key workout.
Take, for example, the study mentioned above. Before running intervals, participants performed all-out jumps, alternating lunges, sit-ups, and burpees in a dense, challenging circuit. Even though the routine didn’t require lifting heavy weights, those bodyweight exercises were far from easy. Given the workout’s high intensity, rapid pace, and limited rest, it provided many of the same stimuli provided by running intervals.
Norris says when runners add HIIT-style sessions to an already demanding week of training—especially on the same day as a run—it can also mess with performance. “Those HIIT workouts almost become an interval stimulus themselves, as well as a muscular one,” Norris says.
The lack of weights can make those workouts seem low-stakes. However, explosive and high-intensity circuits can carry a significant recovery cost, especially for runners already completing intervals, long runs, and tempo work, Norris adds.
That’s not to say you shouldn’t do explosive exercises, like plyometrics, but rather to implement them into your schedule strategically. Jones previously told Runner’s World that runners should perform plyometric exercises with fresh legs, after a warmup, and before a lifting session. You can also fit them into your prerun routine, as long as you keep dose and intent in mind: A few purposeful jumps done to sharpen power do not carry the same recovery cost as a HIIT circuit designed to empty the tank.
Remember, you’re a “runner who also lifts,” Norris says. Strength work should serve your running goals, not the other way around. You don’t want the high-volume, strength-first training balance of a CrossFit or Hyrox athlete—especially when training for a race.
Watch for Signs You’re Doing Too Much
Simply completing both your run and strength workouts says little about whether the double day actually accomplished its desired effect. To ensure the pairing hasn’t cost you more than it benefited you, Norris suggests watching for these four signs.
1. Your Lifting Form Starts to Break Down
“If [a runner is] unable to lift with good form or they’re too sore the next day to complete even their recovery run, that’s usually a sign we just did too much,” Norris says.
Norris encourages runners to leave at least four hours between their run and lift (though research suggests six hours)—if their schedule allows. This gives you an opportunity to refuel after your run and bring better energy to your strength session.
If poor form persists, she recommends moving the lift to the following day. You also might need to target a training schedule that separates running and lifting days until you establish a strong strength base.
People often need six to eight weeks to adapt to a new training stimulus, Norris says. Gradually introducing double-workout days over time will allow your body the needed runway to absorb the added stress without overwhelming its recovery capacity.
2. Soreness Lingers for Several Days
Significant delayed-onset muscle soreness (DOMS) can signal too much added weight, volume, or density (not enough recovery time between sets) in a strength workout.
If you’re experiencing DOMS multiple days after a double-workout day, Norris suggests first looking at the strength workout itself: Did you increase the load (weight or reps) too quickly from your previous workout? Did you cut too much rest between sets?
Depending on the answer, solutions include: lowering the weight, decreasing reps, or increasing the rest time.
3. Your Recovery Run No Longer Feels Restorative
A recovery run should not turn into another hard effort because your legs remain wrecked from the previous day’s double. If easy mileage starts to feel unusually difficult, you may need to shorten your lift or move it farther from your quality sessions.
4. Your Next Key Workout Falls Flat
When interval pace, tempo effort, or long-run quality suffers after a double day, it can mean strength work took too much out of you the day before. At that point, Norris recommends rearranging your week instead of trying to push through fatigue. Try pushing back your hard workout an extra day to allow for more recovery.
Norris also encourages runners to space their two weekly lifts two to three days apart—and take at least one day off from any running and lifting each week.
A double day earns its place only when the next key run can still drive the adaptations you’re training for, Norris explains. Properly spacing your strength work and protecting your rest days helps set you up for just that.
Matt Rudisill is an Associate Service Editor who has been with Runner’s World since 2025. A Nittany Lion through-and-through, Matt graduated from Penn State in 2022 with a degree in journalism and worked in communications for the university’s athletic department for three years as the main contact and photographer for its nationally-ranked cross country and track & field teams. Matt was also heavily involved in communications efforts for Penn State football, men’s basketball, and women’s gymnastics. In his role with Runner’s World, Matt has interviewed Olympians, world champions, and countless experts in the field to create service content that helps runners of all ages and experience levels train smarter and race faster. When he’s not out jogging, Matt can be found tweeting bad takes about the Phillies or watching movies.