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Testing For Hockey Players:

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 The purpose of this brief article is to explain our testing rationale for the hockey playing population at Donskov Strength and Conditioning.  Each respective practitioner has his/her own unique reality.  The goal is to allow one’s unique reality to dictate the model used for the planning of training, monitoring and testing.  All models are wrong, some are more useful than others.  When it comes to testing, I tend to ask myself the following questions: 1.) What test(s) are the most relevant for our hockey players?  What testing resources do I have at my disposal?  Do I have access to ice?  How long do I have to work with the athlete?  How much time, away from programming do I want to allot for testing?  Is testing necessary? 

Prior to testing, I firmly believe that each practitioner should develop a theoretical framework that aids in understanding the “why” behind what is attempting to be accomplished with the testing itself.  Our framework has been adopted directly from Impellizzeri et al [1].  Essentially, we are attempting to start with the scoreboard and work backwards.  The relevant constructs that most in the strength and conditioning field focus on are the physical properties associated with sport and the causal indicators of these constructs.  Hockey is a very unique game in the fact that it’s played on the ice.  The best way to choose relevant tests is to measure direct efforts on the ice (games and practice) and attempt to choose the best test(s) that mimic these efforts.  “A test should be used only if it is valid, more reliable than the event, allows estimation of performance enhancement in the event, and if the subjects replicate their usual training and dietary practices for the study; otherwise the event itself provides the only dependable estimate of performance enhancement [2].”

 

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Theoretical Testing Framework for choosing the best test (adopted from Impellizzeri et al)

A distant second is to scour the scientific literature and seek test(s) that most closely correlate into physical skating ability.  In full transparency, our reality in the private sector doesn’t allow us to have access to the ice for testing.  However, several colleagues have reached out and asked me if I did have access, which tests would I use.  The goal of testing/collecting KPIs is not to compete with sport, rather to provide prognostic/diagnostic value in the shortest amount of time with the least wear and tear on the athlete.  Targeted baselines are superior to non-specific noise.  I like the test(s) below because: 1) they are easy to set up, 2) they require minimal resources, 3) they provide adequate information without physiologically interfering with skill work, 4) there has been lots of research done on these tests deeming them reliable (ICC), 5) they mimic the abilities needed to compete in sport [3]. 

Change of Direction:  S-Cornering Test[4-7].  This test aims at measuring change of direction (#1 located below) on the ice.  It’s a relatively simple test which can be measured with standard timing gates.  This test has a relatively high intra-class correlation (r=0.76). 

Acceleration/Speed:  6.1-meter acceleration, 47.85-meter speed test [4, 7].  These tests measure both acceleration from a standstill and speed in a straight line (#2 located below).  Once again, this test is relatively easy to set up and can be done in unison if one possesses two timing gate systems.  Both tests have moderate (r=0.68 for acceleration) and high (r=0.85) ICC’s.

Aerobic Capacity/Lactate Threshold:  Modified Reed Repeat Sprint [7].  This test starts on the goal line.  The player skates to the far goal line, stops and skates through the blue line nearest to the starting goal line (#5 located below).  Six repetitions are performed with a :30 rest between each.  This test has a very good ICC (r=0.99). 

There are inherent limitations to each of these tests as none measures hockey IQ, puck control, and the technical and tactical elements needed to play at the elite level.  The best test is the game itself. 

 b2ap3_thumbnail_Picture1.png

 

Our reality:

The truth is, we don’t have much time with our athletes.  A good summer at Donskov Strength and Conditioning would be anywhere from 12-20 weeks in length with 3 to 4 touch points/week.   Our philosophy is not to test our athletes.  We don’t feel it’s necessary.  We feel that: 1) it wastes valuable time if it’s not done often,  2) it places tremendous stress on the body day #1 of the program when most athletes are depleted, sore and fatigued from the season, 3) if it’s not done consistently, it won’t steer performance at the micro level.  Instead, we have created a hierarchical decision tree around which off-ice measures best correlate to skating performance. We rate these key performance indicators (KPI’s) and build them into the program each micro cycle allowing us to piecemeal measure on a consistent basis.  The higher the correlation to skating, the higher the KPI stands on our list. 

When scouring the research, specifically the NHL combine, very few tests predict on ice performance.  I have writtenabout this extensively in the past.  Additional independent research can be found below and in my new book.

  1. Mascaro et al. (5)

Population: Nine professional hockey players

Key Findings: Only vertical jump (not standing broad jump or forty-yard dash) was associated with skating speed (goal line to goal line, 54.9 meters).

  1. Runner et al. [8]

Population: Male collegiate hockey players

Key Findings: Only vertical jump (not standing broad jump, one RM squat or forty-yard dash) was associated with skating speed (forward. and backward, ninety-feet acceleration test).

  1. Burr et al. [9]

Population: 853 elite draft-eligible players (combine testing as a predictor of hockey-playing potential)

Key Findings: When eliminating goaltenders using multivariate modeling, peak anaerobic power (Wingate), body fat index, and standing long jump appear to be most correlative to playing potential (as opposed to bench press, sit-ups, and vertical jump).

  1. Potteiger et al. (8)

Population: Twenty-one Men’s Division I ice hockey players

Key Findings: On-ice skating times (Repeat Skate Sprint test) were not significantly correlated to isokinetic dynamometer variables. On-ice skating times were moderately correlated to percentage body fat. On-ice skating times were significantly correlated with Wingate anaerobic power and capacity measures.

  1. Delisle-Houde et al. [10]

Population: Eighteen male Canadian college hockey players

Key Findings: On-ice thirty-meter forward sprint was significantly correlated with Wingate relative peak power, standing long jump, vertical jump impulse, and off-ice pro agility. Correlations were moderate to strong.

  1. Janot et al. [7]

Population: Division III ice hockey players

Key Findings: Vertical jump, forty-yard dash, peak power percentage drop, and 1.5-mile run time were the best predictors of performance. In particular, the vertical jump and forty-yard dash were the best predictors of repeat skate performance using the Modified Repeat Skate Sprint test.

  1. Farlinger et al. [5]

Population: AA and AAA hockey players

Key Findings: Both the thirty-meter sprint and three-hop jump (as opposed to vertical jump or broad jump) correlated most with on-ice performance (thirty-five-meter sprint and cornering S test).

From this information, we deduce, and plug and play into the decision tree below (Figure 1) to create our KPI measurement battery (Figure 2).

 

 b2ap3_thumbnail_Screen-Shot-2020-03-28-at-10.54.38-AM.png

 

 b2ap3_thumbnail_Screen-Shot-2020-03-28-at-10.54.48-AM.png

Our KPI’s are measured at the beginning of each micro cycle enabling us to collect relevant information, steer programming while avoiding the learning effect.  The higher the correlation to the ice, the more weight we place on it. These indicators are far from perfect.  NO test can replicate the game of hockey except the game itself.  The key for us is to collect baselines, measure, manage, and adjust using variables we feel will drive success.  Our KPI’s are simple at first glance, but an awful lot of time and effort is spent rationalizing the “why” behind each and every test/monitoring tool.  Every reality is different, our unique reality led us to our current KPI philosophy. 

 

References:

 

  1. Impellizzeri, F.M. and S.M. Marcora, Test validation in sport physiology: lessons learned from clinimetrics.International journal of sports physiology and performance, 2009. 4(2): p. 269-277.
  2. Hopkins, W.G., J.A. Hawley, and L.M. Burke, Design and analysis of research on sport performance enhancement.Medicine & Science in Sports & Exercise, 1999. 31(3): p. 472-485.
  3. Lignell, E., et al., Analysis of High-Intensity Skating in Top-Class Ice Hockey Match-Play in Relation to Training Status and Muscle Damage. The Journal of Strength & Conditioning Research, 2018. 32(5): p. 1303-1310.
  4. Bracko, M.R., On-ice performance characteristics of elite and non-elite women's ice hockey players. Journal of Strength and Conditioning Research, 2001. 15(1): p. 42-47.
  5. Farlinger, C.M., L.D. Kruisselbrink, and J.R. Fowles, Relationships to skating performance in competitive hockey players. Journal of Strength and Conditioning Research, 2007. 21(3): p. 915-922.
  6. Henriksson, T., et al., Laboratory-and field-based testing as predictors of skating performance in competitive-level female ice hockey. Open access journal of sports medicine, 2016. 7: p. 81.
  7. Janot, J.M., N.M. Beltz, and L.D. Dalleck, Multiple off-ice performance variables predict on-ice skating performance in male and female division III ice hockey players. Journal of sports science & medicine, 2015. 14(3): p. 522.
  8. Runner, A.R., et al., Predictors of speed using off-ice measures of college hockey players. Journal of strength and conditioning research, 2016. 30(6): p. 1626-1632.
  9. Burr, J.F., et al., Relationship of physical fitness test results and hockey playing potential in elite-level ice hockey players. The Journal of Strength & Conditioning Research, 2008. 22(5): p. 1535-1543.
  10. Delisle-Houde, P., et al., Predicting On-Ice Skating Using Laboratory-and Field-Based Assessments in Collegiate Ice Hockey Players. International journal of sports physiology and performance, 2019. 1(aop): p. 1-21.
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