Panghal was joined by a fit-again Vikas Krishan, who underwent shoulder surgery last year after the Olympics, Manish Kaushik, Satish Kumar, and Ashish Kumar in the men's camp in Patiala.
The 13-day national camps for men and women will get underway at separate locations from 11 December.
Sports Ministry says athletes, coaches involved in doping cases eligible for National Awards after serving ban
In a circular issued for this year's honours, which are expected to be announced in the next few days, the ministry said that athletes penalised for doping offences will be eligible at the end of their suspensions but any achievements during the period will not be considered for the awards.
Amit Panghal (52kg), Manish Kaushik (63kg), Vikas Krishan (69kg), Ashish Chaudhary (75kg) and Satish Kumar (+91kg) had competed at the Tokyo Games.
Tokyo Olympics 2020: BFI president Ajay Singh rules out 'knee jerk' reactions to mixed bag performance from boxers
Only one Indian boxer out of five registered a win at Tokyo 2020 Games.
Tokyo Olympics: India women's hockey team enters quarters for first time in 41 years, PV Sindhu, Amit Panghal suffer defeats
World No 1 flyweight boxer Amit Panghal and star shutter PV Sindhu were the big names to experience defeats even though the latter is still in the hunt for a medal when she competes in the bronze playoff.
Tokyo Olympics 2020 Day 8 Highlights: PV Sindhu beaten by Tai Tzu-ying; Kamalpreet Kaur qualifies for discus throw final
Follow live scores and updates of the events on Day 8 of Tokyo Olympics 2020 on our blog
Vikas Krishan (69kg) will open India's boxing campaign on Saturday against local favourite Sewonrets Quincy Mensah Okazawa, just one of the several tricky opponents that the country's pugilists will have to get past as they negotiate a challenging path to the medal rounds.
An unprecedented nine Indian boxers would be vying for medals at the showpiece, where none could secure a podium finish in the 2016 edition.
The likes of archers Deepika Kumari and Atanu Das, table tennis players G Sathiyan and A Sharath Kamal, ace shuttlers PV Sindhu and B Sai Praneeth and lone Indian gymnast in fray, Pranati Nayak, also started their training on Monday.
Tokyo Olympics 2020: High-Performance Director Santiago Nieva confident of 'stronger performance' from Indian boxers
Nine Indian boxers are taking part in Tokyo Olympics 2020.
From Amit Panghal to MC Mary Kom, here are nine Indian boxers who will go for glory at Tokyo Olympics 2020,
An unprecedented nine Indian pugilists have qualified for the Tokyo Olympics, including five men and four women.
The seedings were unveiled by the International Olympic Committee's draws boxing task force, which is conducting the competition at the games.
Indian boxing's trailblazer Vijender Singh outgrows Olympic identity, says 'life is a new lesson everyday'
With COVID-19 casting a shadow on almost everything that was once normal in the world, Vijender's professional career is also on hold for now although he does hope to fight at least once later this year.
The complete modalities of the planned trip will be revealed after the venue is finalised. The Indian boxing team has travelled quite a bit in the past few months for tournaments and training, including a lengthy trip to Europe.
Asian Boxing Championships: Sanjeet fetches lone gold among men as Amit Panghal, Shiva Thapa end with silver
Sanjeet triumphed 4-1 over Levit, who was chasing his fourth gold of the tournament and is an Olympic silver-medallist.
Asian Boxing Championships: Jury rejects India's protest against decision in Amit Panghal’s final loss to Shakhobidin Zoirov
Defending champion Panghal lost 2-3 to Uzbekistan's Shakhobidin Zoirov in the men's 52kg final to settle for silver in the Asian Boxing Championships in Dubai.
Asian Boxing Championships: Pooja Rani strikes gold as veteran boxer MC Mary Kom, two others sign off with silver
The Olympic-bound Pooja (75 kg), who was competing in her first bout of the tournament after getting a bye and a walkover earlier, dismantled Mavluda Movlonova of Uzbekistan with a clinical performance.
Another Olympic-bound boxer Pooja Rani, who received a walk-over in the semi-finals, will fight against an in-form Mavluda Movlonova of Uzbekistan.