MOSCOW -- Russian President Vladimir Putin has made his first public appearance since speculation about his health rose sharply last week.

Putin on Sunday marked the national Unity Day holiday by laying flowers at the monument in Red Square commemorating the organizers of fighters who drove out Polish-Lithuanian occupiers in 1612.

Putin has cancelled some expected trips abroad and made few journeys to the Kremlin in recent weeks. A newspaper report last week said Putin had injured himself in a widely publicized flight in a motorized hang-glider in September.

His spokesman said Putin was suffering from a pulled muscle, but denied it was connected to the flight.

Putin walked slowly but without assistance to the monument and his condition was unclear.

Loading Slideshow...
  • The Hunter

    Russian Prime Minister and President-elect Vladimir Putin shoots with a rifle during the the para-Olympic biathlon championship of Russia in the Krasnaya Polyana ski resort near the sea resort of Sochi, southern Russia, Friday, March, 9, 2012. (AP Photo/RIA-Novosti, Alexei Druzhinin, Goverment Press Service)

  • The Pilot

    A picture taken on August 16, 2005, shows Vladimir Putin, then Russia’s President, sitting in the cockpit of Tupolev Tu-160 strategic bomber jet at a military airport, outside Moscow, before his supersonic flight in the cruise-missile carrying bomber jet. (VLADIMIR RODIONOV/AFP/Getty Images)

  • The Horse Whisperer

    In this Sept. 2010, photo released on Saturday, Oct. 30, 2010, Russian Prime Minister Vladimir Putin pats a horse during his trip in Ubsunur Hollow in the Siberian Tyva region (also referred to as Tuva), on the border with Mongolia, Russia. (AP Photo/RIA Novosti, Alexei Druzhinin, Pool)

  • The Hockey Star

    Russian Prime Minister Vladimir Putin takes part in a training of ice hockey players of the USSR Hockey Legends club at the Megasport Arena in Moscow, Friday, Nov. 18, 2011. (AP Photo/RIA Novosti, Alexei Nikolsky, Pool)

  • The Bird Man

    Russian President Vladimir Putin flies in a motorized hang glider alongside two Siberian white cranes, on the Yamal Peninsula, in Russia Wednesday Sept. 5, 2012. (AP Photo/RIA-Novosti, Alexei Druzhinin, Presidential Press Service)

  • The Diver

    In his wetsuit, Putin embarks on a dive to an underwater archaeological site at Phanagoria on the Taman Peninsula on Aug. 10, 2011. (Alexey Druzhinin / AFP/Getty Images)

  • The Siberian Explorer

    In this Sept. 2010 photo released on Saturday, Oct. 30, 2010, Russian Prime Minister Vladimir Putin rides a horse during his trip in Ubsunur Hollow in the Siberian Tyva region (also referred to as Tuva), on the border with Mongolia, Russia. (AP Photo/RIA Novosti, Alexei Druzhinin, Pool)

  • The Fisherman

    In this Sept. 2010 photo released on Saturday, Oct. 30, 2010, Russian Prime Minister Vladimir Putin holds a fish during his trip in Ubsunur Hollow in the Siberian Tyva region (also referred to as Tuva), on the border with Mongolia, Russia. (AP Photo/RIA Novosti, Alexei Druzhinin, Pool)

  • The Navigator

    In this Sept. 2010, photo released on Saturday, Oct. 30, 2010, then Russian Prime Minister Vladimir Putin carries a hunting rifle during his trip in Ubsunur Hollow in the Siberian Tyva region (also referred to as Tuva), on the border with Mongolia, Russia. (AP Photo/RIA Novosti, Alexei Druzhinin, POOL, file)

  • The Construction Worker

    Russian Prime minister Vladimir Putin gestures as he visits the Solitaire ship in Finnish gulf, 200 km. (125 miles) west of St. Petersburg, Russia, Monday, Sept. 20, 2010. (AP Photo/Dmitry Lovetsky, pool)

  • The Whale Hunter

    Russian Prime Minister Vladimir Putin holds a crossbow as he sits on a rubber boat at the Olga Harbor of Kamchatka Peninsula during a scientific expedition, to study gray whales on Wednesday, Aug. 25, 2010. (AP Photo/ RIA Novosti, Alexei Druzhinin, Pool)

  • The Biker

    Russian Prime Minister Vladimir Putin arrives for the meeting with motorbikers at their camp at Gasfort Lake near Sevastopol in Ukraine's Crimea Peninsula, Saturday, July 24, 2010. (AP Photo/RIA-Novosti, Alexei Druzhinin, Pool)

  • The Farmer

    Russian Prime Minister Vladimir Putin feeds elk calves while visiting the Losiny Ostrov national park in Moscow, Saturday, June 5, 2010. (AP Photo/Alexei Druzhinin, Pool)

  • The Doctor

    Russian Health Minister Tatyana Golikova, Kemerovo Gov. Aman Tuleyev, an unidentified doctor and Russian Premier Vladimir Putin, from left, visit wounded miners at a hospital of Novokuznetsk in the west Siberian region of Kemerovo, Tuesday, May 11, 2010. (AP Photo/RIA Novosti, Alexei Nokolsky, pool)

  • The Polar Bear Subduer/Scientist

    Russian Prime Minister Vladimir Putin, right, fixes a radio beacon on a neck of a polar bear, which was anaesthetized, during a visit to a research institute at the Franz Josef Land archipelago in the Arctic Ocean on Thursday, April 29, 2010.(AP Photo/RIA Novosti, pool)

  • The Judo Fighter

    Russian Prime Minister Vladimir Putin holds a judo training session at the Top Athletic School during his working visit to St Petersburg, on December 18, 2009 (Alexei Druzhinin/AFP/Getty Images)

  • The Centaur

    Russia's Prime Minister Vladimir Putin rides a horse in southern Siberia's Tuva region, on August 3, 2009. (Reuters/RIA Novosti/Alexei Druzhinin)

  • The Politician

    In this Sunday, March 26, 2000, file photo, then acting Russian President and Presidential candidate Vladimir Putin talks with representatives of the news media at a polling station in Moscow. (AP Photo/ Alexander Zemlianichenko, file)