"There is a lot of difference when it comes to training when compared to my playing days. There is a lot of emphasis on scientific approach," said Halappa, who has recently joined the Indian Senior Men's camp as a coach.
"Back then, this is in the early 2000, we did not use any scientific methods to train. But now, I see this team go about a very systematic approach which is backed by scientific methodology when it comes to training.
"Between 2008-2012, we were introduced to some innovative training methods but it's far more advanced now and it's only helped in the growth of the sport," he added.
The 36-year-old insisted that having a support staff that includes a physio, masseuse, a mental trainer, scientific advisor apart from an analytical coach is the key to work towards better results.
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"It's this approach that matters. Having people who are experts in their own department was lacking and now that these things are put in place even the players are happy. Smaller details are looked into and I feel these aspects have been the key in the team's rapid progress," asserted Halappa, who is also part of the Hockey India Selection Committee.
"Only yesterday he (Oltmans) discussed with the team and put forth a few points to the team that highlighted our goals to ensure we reach the top. I am happy I am working with this team in a new role and I am thankful to Hockey India and Roelant for giving me this opportunity to pay back to the sport," he said.
For Halappa, who was popular for his attacking skills as a midfielder, this stint with the team is a new learning.
"It was very different when I was playing. Main thing for me right now is to get to know each other well, players come from different cultural backgrounds, language and their approach is different and I see this as a chance for me to grow as a person," he said.
Halappa, who has played alongside senior players such as Sardar Singh, PR Sreejesh, SV Sunil, said the junior players see him as one among the senior players as opposed to seeing him as a coach.