Training Tip Tuesday #9- A Look at Running Economy: Part 3

I hope everyone had a great thanksgiving and has had some time to work off that delicious turkey, gravy, dressing, sweet potatoes and pumpkin pie! Actually, I contend that thanksgiving food is relatively healthy if it weren't for the enormous quantity we feel compelled to consume. How is meat, potatoes, maybe a salad and some rolls bad for you? It's the sheer volume of food that does us in and lays waste to our ambitious holiday goals of staving off the ever reproducing lipids appearing about our torso. Oh well, whatever you ate for thanksgiving I hope it was delicious and enjoyed with friends and family!

To continue our discussion of running economy I will finally divulge what Saunders et al., concluded can actually be done to improve RE. 

1) Altitude exposure

There are various mechanisms that researchers believe may play a role in lowering RE with altitude exposure. However one thing is for sure- numerous studies have found a lower VO2 (oxygen) during a steady state test in athletes following 3 weeks at altitude. The performance gains are well proven but exactly WHY or HOW isn't as conclusive. Studies have shown that Kenyan runners (living and training at altitude) did not "accumulate lactate during running until near very high or peak exercises intensities, and had much lower lactate both at altitude and sea level at high relative exercise intensities." This was in comparison to Scandinavian runners who lived and trained at sea level. One of the reasons for this is thought to be the greater skeletal muscle oxidative enzyme capacity exhibited in Kenyan runners which shifts their metabolism from anaerobic to aerobic. Easier said than done altitude training obviously has it's benefits but the expense and length of time you must remain at altitude doesn't make it a viable option for most of us to improve our RE.

2) Training in the Heat

Slightly easier to attain for those of us living in Texas, a mildly elevated core temperature is thought to increase RE by "increasing the efficient of the working muscle." Heat training promotes an increase in plasma volume and decreased blood viscosity. Another adaptation is the ability to run at a given speed with lower heart rate and core temperature following a period of heat training. For most of us, heat training isn't a choice in the summer and I don't recommend post-poning your runs until 3:00 pm during a warm July day just to accomplish this benefit. The article doesn't state what temperature constituted "heat" training but I'd be willing to guess it isn't 110 degrees that is relatively common for a Texas summer day.

3) Strength Training

NOOOOOOOOOOOOOO… I can nearly hear the moans emitting from my laptop speakers. For the most part, us triathlete HATE strength training. And I totally understand and can sympathize with the time-crunched triathlete who is having a hard enough time fitting in three sports a week much less a fourth. Well, the studies are in and other than helping injury prevention (another benefit I think strength training has), strength training can and WILL help you run faster. I apologize for the slightly wordy quotation but I think Saunders et al., summarizes things much more nicely and intelligently than I can-

"Endurance athletes must be able to sustain a high average running velocity for the duration of a race." (That's called going as fast as we can for a long time) "This emphasizes the role of neuromuscular characteristics in voluntary and reflex neural activation, muscle force and elasticity, running mechanics, and the anaerobic capacities in elite endurance runners.” (Helps your brain and sympathetic nervous system fire muscles quickly so you can go fast).

This strength training can be either in the form of heavy-weight training or plyometric type explosive-training. Both have their place and their advantages.

Heavy-weight strength training was shown to enhance RE in well trained triathletes (average VO2max of 69 mL/kg/min, which is very high). If it’s benefitting very high level athletes who are already operating further towards the ceiling of their performance capabilities then chances are it can benefit you as well. A great example of someone promoting this in our local San Antonio community is Jen Rulon, of Endurance-Fit. I highly discourage jumping into deadlifts and deep squats if you don’t have a personal trainer or someone who can coach you in the proper technique.

Plyometric training is very popular with sprinters, throwers, football players and other power athletes but it also has its place in the endurance community. By enhancing the muscles ability to generate power and promoting storage and use of elastic energy plyometric training can help a runner produce more force “without a proportionate increase in metabolic energy requirement.” Basically, you can push off the ground harder and faster without using more oxygen. A good thing! Plyometric training is a little easier to do on your own or with a coach because all you need is some space and lots of sweat. Here are a few basic, introductory drills and plyometrics for runners.

The area of strength training is one I think triathletes and runners have the most room for improvement. If strength training can elicit significant performance gains from elite athletes who are at the very tip of the their ability than it will definitely help beginner, intermediate and advanced triathletes as well.